Answer: Option B) Second
The baby is actually pushed out and delivered in the second stage of labour.
Explanation:
Of the three stages of labour during pregnancy, the second stage involves the release of the baby through the birth canal. it is during this stage that the baby is actually seen in flesh and can be carried by the birth attendants present.
Final preparation for cell division is made during the cell life cycle subphase called G2. Select one: True False
Answer:false the final phase is M
Explanation:
Which species is least likely to become extinct? a. A mammal species that can live equally well on dry land and in fresh water b. A fish species that has hybridized with another species to produce infertile offspring c. A fish species found in all five of the Great Lakes d. A mammal species that feeds on a rare tropical orchid e. A fish species that feeds on only rare snails found in only one small river Submit
Answer:
a. A mammal species that can live equally well on dry land and in fresh water
Explanation:
Species need favorable conditions to thrive, reproduce, and survive going extinct from an environment. When such conditions change in an environment, and the species in that environment are unable to evolve along with such changes to become adapted to survive, they go extinct.
From the options given in the question, the least likely to become extinct is a mammal species that can live equally well on dry land and also in fresh water, as they would be well adapted to changes that occur in their habitat .
The mammal species that can live on both land and water is least likely to face extinction due to its adaptability and wide geographic range. Specialized species with very specific dietary needs or limited ranges are more at risk.
Explanation:The species least likely to become extinct is a mammal species that can live equally well on dry land and in freshwater. This species likely has a high level of adaptability to different habitats which makes them more resilient to environmental changes. Moreover, this adaptability gives them a broader geographic range, which, according to studies, reduces their chance of extinction compared to species with very small ranges. On the other hand, species like the one that feeds on a rare tropical orchid or the fish that feed on rare snails found in only one small river are highly specialized and their survival is critically tied to very specific and potentially vulnerable conditions which makes them more prone to extinction.
Also, the fish species that has hybridized with another species to produce infertile offspring faces a genetic dead-end, which does not bode well for its continued survival. Meanwhile, a fish species found in all five of the Great Lakes has a comparatively large range and is less likely to be categorized as rare, making extinction less probable, though localized threats could still pose significant risk.
In the simplest endocrine reflexes, which structure contains the sensor cells that trigger hormone release?
Answer:
Endocrine gland.
Explanation:
The endocrine gland makes the hormones in our body, and they are responsible for many functions in the human body such as:
1) Synthesized hormones which help to control our growth & development, mood, reproduction, and organs.
2) This gland contains sensors cells that help to control how hormones are released.
3) Helps to send hormones into the bloodstream so with the help of bloodstream hormones can reach to the other parts of the body.
A microbiologist inoculates a growth medium with 100 bacterial cells/ml. If the generation time of the species is 1 hour, and there is no lag phase, how long will it be before the culture contains more than 10,000 cells/ml?
Answer:
Seven hours
Explanation:
We were being told that;
A microbiologist inoculates a growth medium with 100 bacterial cells/ml
Also, the generation time of the species is 1 hour.
And more so no lag phase (i.e a period where the individual bacteria are maturing and not yet able to divide). There is nothing as such in the process given. Hence, this will make the replication more faster.
So , since the generation time is one hour and we are being given 100 bacterial cells/ml
∴
After 1 hour= replication of the bacterial cells would have been doubled to =200 bacterial cells
2nd hour = 400 bacterial cells
3rd hour = 800 bacterial cells
4th hour = 1600 bacterial cells
5th hour = 3200 bacterial cells
6th hour = 6400 bacterial cells
7th hour = 12800 bacterial cells
∴ We can see that at at the 7th hour, the culture has contained more than 10,000 cells/ml
Archaeans Choose one: A. are the likely source of chloroplasts and mitochondria. B. are much more restricted in environment than organisms classified as either bacteria or eukarya. C. are prokaryotic like bacteria, but their gene expression machinery is more similar to eukaryotic organisms. D. look like pre-eukaryotic cells with a nucleus.
Answer:
The correct answer is B: "Archaeans are much more restricted in environment than organisms classified as either bacteria or eukarya".
Explanation:
The archaea domain is composed of prokaryotic unicellular microorganisms that lack a nucleus, nuclear membrane, and organelles, but they have a cell wall that protects the cell. They reproduce asexually.
Phenotypically, Archaea looks like Bacteria, being small and rounded, caned or spiriled-shaped, but they possess biochemical and genetic characteristics very different from bacteria.
Archaea are likely a source of mitochondria in eukaryotic cells. According to the endosymbiosis theory, these cells were free-living bacteria that were incorporated by another bigger cell, becoming the new organelle mitochondria. In the same way, Eukarya bacteria make a place for chloroplast.
These organisms are restricted to marginal habitats. They are capable of inhabiting in places with extreme temperature, salinity, acidity, or pH, among others.
Answer:
Answer is C.
Explanation:
Archaeans are prokaryotic , but their gene expression mechanism is more similar to that of eukaryotic organisms.
Archaeans are organisms that, like bacteria, lack a specific membrane around their genetic material. ... Unlike bacteria and Ukraine, Arachia has membranes containing branched hydrocarbon chains that are linked to glycerol via an ether linkage. Arachnoid cells do not contain peptidoglycan.
In animal cells, a certain anticancer drug disrupts microtubule formation by binding to microtubules and accelerating their assembly from the protein precursor, tubulin. This stops mitosis from proceeding. What specific process must this anticancer drug affect?
a. Chromatid assembly
b. Formation of the mitotic spindle
c. Formation of the centrioles
d. The S phase of the cell cycle
Answer:
b. Formation of the mitotic spindle
Explanation:
The mitotic spindle is made of microtubules. Microtubules are the polymers of tubulin proteins. The formation of the spindle starts in prophase. It is required to align the chromosomes at the cell's equator during metaphase. This is followed by splitting of centromere and separation of two sister chromatids to the opposite poles of the cell. The shortening of microtubules of the spindle during anaphase assist in the chromosome movement. Therefore, the mitotic spindle is required for cell division to occur. Anticancer drugs do not allow the formation of the spindle by interfering in the assembly of tubulin protein subunits.
Final answer:
The anticancer drug disrupts mitosis by affecting the formation of the mitotic spindle (option b), leading to the arrest of cell division and death of the cancer cells.
Explanation:
The anticancer drug in question affects the formation of the mitotic spindle, which is a crucial component during cell division. This spindle is responsible for sorting and separating chromosomes during mitosis.
When chemotherapy drugs like vincristine or colchicine bind to tubulin, they disrupt the assembly and disassembly of microtubules which constitute the mitotic spindle.
Consequently, without a functional spindle, the chromosomes cannot be properly organized and segregated, leading to the arrest of mitosis and the eventual death of the cell. This is particularly effective against cancer cells, as it stops their rapid and uncontrolled division.
Which of the following can be learned from a computer-based (computational) analysis of the amino acid sequence of a membrane protein, which can be readily deduced from the nucleotide sequence of its isolated gene?A) its structureB) its colorC) its orientation within the lipid bilayerD) its population in each cellE) both its structure and its orientation within the lipid bilayer
Answer:
The correct option is E) both its structure and its orientation within the lipid bilayer
Explanation:
Computational simulations can be described as models of a particular system of nature which are studied by making simulations on the computer.
Computational simulations are generally very easy to understand as they very easily help us understand the structures of molecules which can otherwise not be seen by the naked eye. They also help us to locate a molecule in a particular place.
Check off all the choices that are valid MAJOR characteristics of organisms.
A
Take in materials from environment to make energy and release wastes
B
Complicated structural organization
C
Complicated chemical organization
Complicated organ organization
E Movement
F
Respond to other organisms
G
Grow and Develop
Respond to environment
Reproduce asexually
Communication
Answer:c
Explanation:
When Thomas Hunt Morgan crossed his red-eyed F1 generation flies to each other, the F2 generation included both red- and white-eyed flies. Remarkably, all the white-eyed flies were male. What was the explanation for this result?
A) The gene involved is on the Y chromosome.
B) The gene involved is on the X chromosome.
C) The gene involved is on an autosome, but only in males.
D) Other male-specific factors influence eye color in flies.
Answer:
B) The gene involved is on the X chromosome.
Explanation:
Thomas Hunt Morgan performed the experiments on the Drosophila and found that genes are located on the chromosomes which are passed o during the reproduction and called it the chromosomal theory of inheritance.
Morgan crossed the white-eyed male mutant to the red-eyed female, a wild trait for eye and observed that during F₁ generation the all-male and female were red-eyed but in F₂ generation only the red-eyed females were produced but all the males were white-eyed.
He found that the gene for the eye colour trait can be linked to the sex of the fly and concluded that it followed the X inheritance pattern as the gene is located on the X chromosome.
Thus, Option-B is the correct answer.
Answer:
Option B, The gene involved is on the X chromosome.
Explanation:
Morgan conducted his studies on Drosophila flies in 1910. He first time noticed a fly with a distinctive white color eye instead of red. Out of curiosity he crossed the white eye fly with a normal red eye fly and noticed that white eyed fly appeared in the second generation and all white eyed flies were male. For the first time, it was observed that some genetic traits are sex linked. In this case the white eye trait was X linked and hence this trait could not appear in female as they have another normal red eye dominant allele which over expressed the white eye allele. However, in male there is no second X chromosome and hence white eyed male possesses recessive white eyed X –chromosome.
Hence, option B is correct
Paracrine hormones are eicosanoids that are produced by one group of cells but have their effect by binding to receptors on neighboring cells without circulating through the blood.
A) True
B) False
Answer:
The correct answer is option A) "True".
Explanation:
Paracrine hormones are a type of eicosanoids (signaling molecule), which are characterized for binding and performing its function on nearby cells rather than the cells where they are produced. Two examples of paracrine hormones are estrogens and testosterone. Estrogens are produced by the ovaries, but they perform their function on ovarian follicles. Testosterone is produced by the Leydig cells of the testes, but they perform their function on adjacent seminiferous tubules.
Dr. Smith is conducting research on the abilities of a man who experiences visual sensations while hearing sounds. Which data collection method should she use?
Answer:
Case study.
Explanation:
The research of psychology are mostly based on the observation and experience of the individual. The psychologist must follows the proper rules and regulation of the research.
Dr, Smith research is based especially on the case study. These case study includes the collection of the data from the multiple source. The reaction of the individual is measured on the different visual sensation and different sounds. Quantitative data collection is mostly used in the case study of the Dr. Smith.
Thus, the answer is case study.
What type of dressing is most beneficial in keeping a wound moist and providing a barrier against disease transmission?
Answer: Occlusive dressing
Explanation:
Occlusive dressings are used for sealing particular types of wounds and their surrounding tissue off from air, fluids and also used in a trauma or first aid situation. Occlusive dressing is beneficial in keeping a wound moist and providing a barrier against disease transmission, by preventing harmful contaminants, such as viruses and bacteria An occlusive dressing is an air- and water-tight trauma medical dressing used in first aid. Application involves adapting the bandage to the appropriate size, applying it to the wound then using a medical adhesive to tape off on all sides to create a complete seal.
"A person who sits for hours on a long airplane flight will have problems will blood pooling below the knees. Why?"
Final answer:
Sitting for a long time on a long airplane flight can lead to blood pooling below the knees and increase the risk of deep vein thrombosis (DVT).
Explanation:
Sitting for hours on a long airplane flight can cause blood pooling below the knees due to a condition called deep vein thrombosis (DVT). DVT occurs when a blood clot forms in the deep veins, usually in the legs. When you sit for a long time, especially in cramped quarters, blood can pool in the deep veins of the legs, increasing the risk of a blood clot. Sitting for a long time on a long airplane flight can lead to blood pooling below the knees and increase the risk of deep vein thrombosis (DVT).
It has been theorized that all of the modern continents on Earth were once part of a single continent. What scientific evidence is used to support this theory?
Answer:
Explanation:
At the end of the 1960s, several American researchers, including Jack E. Oliver and Bryan L. Isacks, had integrated this notion of seabed expansion with that of drifting continents and formulated the basis of the theory of Tectonic plates. According to the last hypothesis, the surface of the Earth, or lithosphere, is composed of a series of large and rigid plates that float in a soft layer (presumably partially molten) of the mantle known as asthenosphere. Oceanic ridges occur along some of the margins of the plate. In this case, the lithospheric plates separate and the material of the ascending mantle forms a new ocean floor along the posterior edges. As the plates move away from the flanks of the ridges, they carry the continents with them.
Based on all these factors, it can be assumed that the Americas joined Europe and Africa until approximately 190 million years ago, when a rift separated them along what is now the crest of the Mid-Atlantic Mountain Range. Later movements of the plate with an average of approximately 2 cm (0.8 inches) per year have brought the continents to their current position. It seems likely, although not yet proven, that this rupture of a single land mass and the drift of its fragments is simply the last of a series of similar events throughout geological time.
Answer:
Explanation:
In 1912 Alfred Wegener German meteorologist proposed the first truly detailed and comprehensive theory of continental drift and was single continent once.
He brought together a chunk of geologic and paleontological data, Alfred W. postulated that throughout most of geologic time there was just Pangea (only one continent).
If a heterozygous woman without hemophilia had children with a man with hemophilia, what is the chance that their first child will have the disease?
Answer:
1/2
Explanation:
let the alleles of the heterozygous woman without hemophilia be = Xhx
And the alleles of the man with hemophilia be XhY
If both XhY × Xhx; we have:
Xh Y
Xh XhXh XhY
x Xhx xY
XhXh and XhY are affected by the diseases
Xhx is a carrier
xY is normal
∴ the probability(chance) that their first child will have the disease is 2/4 of the total offspring
=1/2
∴ the probability (chance) that their first child will have the disease is 1/2
If scientists are trying to study evolutionary relationships using the molecular clock, is it useful to study the genes that cause disease?
It is not possible to study the genes that cause disease using the molecular clock.
Explanation:
The molecular clock technique is an important tool in molecular systematic, the use of molecular genetics information to determine the correct scientific classification of organisms or to study variation in selective forces. A nice aspect of molecular clocks is that different genes evolve at different rates, which gives us flexibility to date events throughout the history of life" Hedges points out. Broadly speaking, the evolution of important genes occurs more slowly than that of genes with less vital functions.
In order to develop a molecular clock, one would need: a sequence of molecules, the rate at which changes occur in a type of molecule and how much total change has occurred in a type of molecule from different species.
Dr. L. Hill conducted a study examining music ability in families; she recorded the concordance rates of music ability of adopted children and their parents (who raised them), and she also recorded the concordance rates of the children with their biological parents. Then, she compared the two sets of concordance rates. Dr. Hill is studying: Selected Answer: Correct Behavior genetics Answers: A.Dominant-recessive B.gene relationships C.Correct Behavior genetics D.Epigenesis Active gene effects
Answer:
Option C, Correct Behavior genetics
Explanation:
Behaviour genetics is the study of the influence of both genes and environment on the behaviour of an individual. This study is done to understand how both genes and environment together affect the behaviour of an individual. It is believed that all forms of behaviors are either inherited or learned. Mr. Hill is noting the concordance rates of music ability for both biological children (who might have inherited this ability from their parents) and adopted children (who might have learned this ability from the musical environment around them)
Hence, option C is correct
Use mathematical representations to trace the transfer of matter and energy from one organism to another.
Transfer = 10/100 of total energy.
Explanation:
Energy and matter is transferred from one organism to another by the process of food chain and food web. In food chain the organism of higher trophic level feeds on the organisms of lower trophic level. On feeding only 10% of the energy gets transferred to the organism of higher trophic level while the rest are being used in the metabolic processes and are produced as heat. This is called as ten percent energy transfer rule.
The mathematical representation of the transfer of energy is given as
Transfer = 10/100 of total energy.
The U.S. government protects fish, a common resource, by A. heavily taxing competing industries. B. subsidizing the fishing industry. C. selling fishing licenses and regulating fish lengths. D. None of the above is correct.
Answer:
The U.S. government protects fish, a common resource, by selling fishing licenses and regulating fish lengths
Explanation:
When there is regulation about a particular goods, it reduces the rate the availability of such goods is abused, US government could actually protect fish through licensing and regulation of the type to be sold including there length which ensures the protection of the juvenile.
construct a chromosome map for genes a b c and d using the over data:A to D=25 percent; A to B=30 percent; C to D=15 percent; B to D=5 percent; B to C=20 percent
Answer:
B-D-C-A.
Explanation:
The chromosome map helps to understand the location of genes in the genome map. The distance between the genes can be used to locate the genes of chromosome.
The distance between the Band D is 5%. The B and D gene can be located with each other. Then gene C is located after D and the distance between them is 15%. This will give the distance between B and C is 20%. The gene A is located at the last position A and the distance between them 30%.
Thus, the correct answer is B-D-C-A.
Chromosome map: A-B-C-D. Distances: A-B > B-C > C-D. Recombination: A-D=25%, A-B=30%, C-D=15%, B-D=5%, B-C=20%.
A chromosome map, also known as a genetic map or linkage map, illustrates the relative positions of genes along a chromosome based on the frequency of recombination events between them. Recombination occurs during meiosis when genetic material is exchanged between homologous chromosomes.
Given the recombination percentages between genes A, B, C, and D, we can construct a chromosome map:
1. A to D = 25%: This indicates that 25% of the offspring exhibit recombination between genes A and D.
2. A to B = 30%: Similarly, 30% of the offspring exhibit recombination between genes A and B.
3. C to D = 15%: 15% of the offspring exhibit recombination between genes C and D.
4. B to D = 5%: Only 5% of the offspring exhibit recombination between genes B and D.
5. B to C = 20%: And 20% of the offspring exhibit recombination between genes B and C.
From these percentages, we can infer the relative distances between the genes. The order of the genes on the chromosome would be A - B - C - D. Additionally, we can deduce the map distances between adjacent genes.
For example, the distance between A and B would be greater than that between B and C, as indicated by the higher recombination percentage between A and B.
Identify what structures in a skeletal muscle will shorten in length during contraction of the muscle.
Answer:
Identify what structures in a skeletal muscle will shorten in length during contraction of the muscle.
The structure that shortens in length during muscle contraction is the sarcomere
Explanation:
Movement does occur in organism/animals as a result of muscle contraction which might give room for shorten of length as described by sarcomere
Which of the following anthropologists fundamentally shaped American anthropology through his studies of European immigrants to the United States and through his studies of the cultures, histories, and languages of Native Americans, including the Kwakiutl?
boas T/F
Answer:
TRUE
Explanation:
Franz Boaz was a German-American scientist born in Minden, Germany in 1858. He is known to be the first to develop scientific method of studying human cultures and societies. This renowned anthropologist became popular for his theory of cultural relativism and his contributions to anthropology. He believes culture is the product of human character rather than cultural determinism. His revolutionary discoveries when studying European immigrants to the US, including studies of the cultures, histories, and languages of Native Americans and Kwakiutl led him propound the theory of cultural relativism. His works and theory helps in discouraging racial divide. Franz Boas is known to be the Father of Modern Anthropology and most especially, he is said to be the founder of Modern American Anthropology.
What provides evidence of an increase in animal species at the same time that atmospheric oxygen concentrations increased?(1 point)
rust deposits
anaerobic organisms
fossil record
stromatolites
Answer:
stromatolites
Explanation:
"stromatolites is a calcareous mound built up of layers of lime-secreting cyanobacteria and trapped sediment, found in Precambrian rocks as the earliest known fossils, and still being formed in lagoons in Australasia"
Ancient cyanobacteria present in stromatolites are considered as key factor for the increased amount of oxygen in atmosphere. Furthermore, these were considered as first organisms to trap carbon dioxide and release oxygen by the process of photosynthesis.
Answer:fossil record
Explanation:
Choose the true statement(s) about prokaryotic external appendages. To be marked correct, youll need to select all true statements, as there may be more than one correct answea.Pili allow for adhesion, movement, and aid in gene transfer through conjugation b.Fimbriae aid in gene transfer through conjugation. c.Flagella allow for motility. d.The glycocalyx promotes adhesion and interferes with phagocytosis.
Answer:
C) Flagella allow for motility; d) glycoclyx promotes adhesion and interferes with phagocytosis.
Explanation:
A) Pili; bacterial conjugation for reproduction
b) Fimbriae; Allow bacteria Adhesion to host cell
c) Flagella; Allow for motility
d) Glycocalyx;promotes adhesion and interferes with phagocytosis
Final answer:
The correct statements about prokaryotic external appendages are that a. Pili allows for adhesion, movement, and aid in gene transfer through conjugation; c. Flagella allows for motility; and d. The glycocalyx promotes adhesion and interferes with phagocytosis.
Explanation:
When examining the true statements about prokaryotic external appendages, we can identify the following:
Pili allow for adhesion and movement, and aid in gene transfer through conjugation.Flagella allow for motility.The glycocalyx promotes adhesion and interferes with phagocytosis.While fimbriae aid in attachment to surfaces and other cells, they are not typically involved in gene transfer through conjugation; this process is primarily facilitated by pili. Therefore, the statement concerning fimbriae aiding in gene transfer through conjugation is not true.
"Can you recognize the eight stages of meiosis based on the location and behavior of the chromosomes?"
Answer:
Four stages are of meiosis I and four stages for meiosis II.
Explanation:
Meiosis involves two sequential cellular divisions, that is , meiosis I and meiosis II. In meiosis I, homologous chromosomes pair and then separate.
Therefore, although the parent cell is diploid (containing two chromosome sets, one maternal and one paternal), each of the two daughter cells is haploid (containing only a single chromosome set).
In meiosis II, the sister chromatids separate. The four daughter cells that result are haploid
Consider the two types of sudoriferous glands. Then click and drag each label into the appropriate category to determine whether it applies to apocrine glands, merocrine (eccrine) glands, or both.
Full Question:
Consider the two types of sudoriferous glands. Then click and drag each label into the appropriate category to determine whether it applies to apocrine glands, merocrine (eccrine) glands, or both.
-Not active until puberty
-Use myoepithelial cells to secrete
-Secrete sweat
-Found in pubic and axillary regions
-Secrete pheromones
-Abundant on hands, feet, and forehead
-Found over entire body
-Scent is meant to attract a potential male
-Thermoregulation
-Utilize ducts to release sweat
Answer:Apocrine Glands:
-Not active until puberty
-Secrete pheromones
-Found in pubic and axillary regions
-Scent is meant to attract a potential male
Merocrine Glands:
-Found over entire body
-Thermoregulation
-Abundant on hands, feet, and forehead
Both Apocrine and Merocrine Glands:
-Secrete sweat
-Use Myoepithelial cells to secrete
-Utilize ducts to release sweat
Explanation:The apocrine and merocrine glands are the subcategories of the sudoriferous glands which secrete the different types of secretions like sweat and oils. Both of them have myoepithelial cells.
The apocrine glands are mainly dependent on the sex hormones and are mainly present in the public region, beard etc. The sweat secreted from these glands are rich in fatty acids and other pheromones. These glands are regional in nature. But the merocrine glands are not hormonal in nature. They are distributed all over the body and secrete sweat whose primary function is to lower body temperature.
Apocrine Glands: These glands are associated with hair follicles and release a thicker, odorless secretion. They are primarily found in areas like the armpits and groin.
Merocrine (Eccrine) Glands: These glands release a watery, odorless sweat directly onto the skin's surface and are distributed all over the body, assisting in temperature regulation.
Both: Both types of glands are involved in regulating body temperature through sweat production. However, their secretion composition and distribution differ.
Sudoriferous glands, also known as sweat glands, encompass two primary types: apocrine and merocrine (eccrine) glands. Apocrine glands, predominantly found in regions like the armpits and groin, produce a thicker secretion associated with body odor.
In contrast, merocrine or eccrine glands release a watery and odorless sweat directly onto the skin's surface, distributed across the entire body, playing a pivotal role in regulating body temperature. Both types of glands participate in thermal regulation by promoting sweat production, although their secretions differ in composition and distribution. Understanding these distinctions is crucial in comprehending how our bodies manage temperature and maintain overall homeostasis.
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The complete question is -"Classify characteristics for apocrine glands, merocrine (eccrine) glands, or both among the two types of sudoriferous glands."
The parts of the brain implicated in ADHD, such as the prefrontal cortex and the basal ganglia, feature large amounts of ____ activity. Many of the medications used to treat ADHD work by boosting the activity of this chemical.
Answer:
The parts of the brain implicated in ADHD, such as the prefrontal cortex and the basal ganglia, feature large amounts of __dopamine__ activity. Many of the medications used to treat ADHD work by boosting the activity of this chemical.
Explanation:
Attention deficit hyperactivity disorder (ADHD) is a medical condition in which patient brain has differences in brain development and activity. This can affect ability of sitting still, attention and self control. Moreover, children can be affected at home, at school and in friendships. (See attached Detailed info graph)
The parts of the brain implicated in ADHD, such as the prefrontal cortex and the basal ganglia, feature large amounts of dopamine activity. Many of the medications used to treat ADHD work by boosting the activity of this chemical.
The parts of the brain associated with ADHD exhibit significant dopamine activity, and treatments often aim to increase dopamine levels through medications. Medications like methylphenidate (Ritalin) and amphetamine with dextroamphetamine (Adderall) elevate dopamine levels, which can help in managing ADHD symptoms. These medications are effective because individuals with ADHD often show decreased dopamine activity in key brain regions associated with motivation and reward. This decrease in dopamine activity is thought to contribute to difficulties in impulse control and motivation which are hallmark symptoms of ADHD.
Which perspective can be described as a marriage between the science of the mind and the science of the brain?
Answer:
Neuroscience or Cognitive Psychology
Explanation:
Cognitive psychology is one of the perspectives in psychology that examines internal mental processes such as problem solving, memory, and language. i.e, a marriage between the science of the mind and the science of the brain
Biopsychology is the perspective that combines the science of the mind and the science of the brain.
The perspective that can be described as a marriage between the science of the mind and the science of the brain is biopsychology. Biopsychology, also known as behavioral neuroscience, is a field that combines biology and psychology to study how the brain and nervous system influence behavior and mental processes. It examines the physiological processes and structures that underlie psychological processes and behavior.
For example, biopsychologists may analyze how changes in neurotransmitter levels can affect mood disorders like depression, or how brain injuries can impact memory and cognition. This interdisciplinary approach helps bridge the gap between the study of the mind and the study of the brain, providing a comprehensive understanding of the biological basis of behavior.
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Blood is accelerated from rest to a speed of 33.0 cm/s in a distance of 1.73 cm by the left ventricle of the heart. Determine the magnitude of the acceleration a of the blood.
Final answer:
To calculate the acceleration of the blood, the kinematic equation[tex]a = (v^2 - u^2) / (2 * s)[/tex]is used, considering the final speed is 30.0 cm/s, initial speed is 0 cm/s, and distance is 1.80 cm, which gives an acceleration of [tex]250 cm/s^2.[/tex]
Explanation:
The question asks about determining the magnitude of acceleration that the blood experiences when accelerated by the left ventricle of the heart from rest to a certain speed across a particular distance. To calculate this, we can use one of the kinematic equations that relate acceleration, final velocity, initial velocity, and displacement:
[tex]a = (v^2 - u^2) / (2 * s)[/tex]
where v is the final velocity (30.0 cm/s), u is the initial velocity (0 cm/s as the blood starts from rest), and s is the distance covered (1.80 cm).
Plugging the values into the equation:
[tex]a = (30.0 cm/s)^2 / (2 * 1.80 cm)[/tex]
[tex]a = 900 cm^2/s^2 / 3.60 cm[/tex]
[tex]a = 250 cm/s^2[/tex]
Therefore, the magnitude of the acceleration of the blood is [tex]250 cm/s^2.[/tex]
Newly made blue jeans are stiff because of the large amounts of starch used in the fabric. The starch is added to make the fabric easier to cut and sew. However, it also makes the material difficult to wear comfortably. Some microbiologists came up with a way of using microbial enzymes to remove the starch before the blue jeans are sold. Which of the following enzymes would be effective at removing the starch?
A) lipase
B) cellulase
C) amylase
D) protease
E) lactase
Answer:
The correct answer is C) amylase
Explanation:
Amylase is the enzyme which is present in our saliva and is also produced by the pancreas called pancreatic amylase. Amylase enzyme is used in the body to digest starch present in our food to glycogen and then glycogen into simple sugars.
Therefore as amylase is used to digest complex starch into simple carbohydrate therefore amylase is the enzyme that can be effective in removing the starch from the blue jeans. Lipase breaks down lipid, cellulase breakdown cellulose, protease breaks down proteins, and lactase breakdown lactose.