Answer:
A) Reticular.
The dominant fiber type of bone tissue is collagen, providing strength and resistance to stretching.
Explanation:The dominant fiber type of bone tissue is collagen. Collagen fibers are made from fibrous protein subunits linked together to form a long and straight fiber. These collagen fibers provide bone with its notable tensile strength, giving it the ability to resist stretching and contribute to the tissue's resilience. In bone tissue, the rigid, mineralized matrix that contains calcium salts and crystals is interwoven with collagen fibers, ensuring the bone's strength and stability.
The _______ is (are) responsible for the red blood cell's ability to transport oxygen.
A. hemoglobin
B. leukocytes
C. platelets
D. hematocrit
Answer:
(A). hemoglobin
Explanation:
Hemoglobin is iron-containing protein, present in RBCs (red blood cells) of nearly all vertebrates and some invertebrates. It is made up of four globular protein units.
The main function of hemoglobin is to transport oxygen to the different parts of the body. The oxygen is requires by the body cells to perform cellular respiration that generates energy in the form of ATP molecules.
Thus, the correct answer is option A.
Describe the function of three areas of the brain (you choose which areas).
Answer:
Brain is the main coordination center of the body and regulates the proper functioning of the body. Brain is divided into three parts- forebrain, midbrain and hindbrain.
Cerebrum: Crerebrum is the largest part of brain and controls the language, communication ability, and the process of learning and memory of an organism.
Hypothalamus: Hypothalamus is located at the base of a brain. Hypothalamus releases various hormones, regulates the body temperature and manages the sexual behavior of an organism.
Thalamus: Thalamus is located above the brain stem and relay the neurons into the cerebral cortex. Thalamus regulates alertness, wakefulness and sleep of an organism.
Final answer:
The cerebrum controls higher brain functions and is divided into four lobes, each with distinct functions. The cerebellum coordinates muscle movements and maintains balance. The brain stem regulates vital life functions and connects the brain to the spinal cord.
Explanation:
The human brain is an intricate organ responsible for controlling many functions of the body, understanding complex thoughts, facilitating communication, and more. In the study of biology, it is essential to understand the different areas of the brain and their specific functions. Three critical areas of the brain are the cerebrum, cerebellum, and brain stem.
The cerebrum is the largest part of the brain and is responsible for higher brain functions such as thought and action. The cerebrum is divided into four lobes: the frontal lobe, responsible for reasoning, planning, parts of speech, movement, emotions, and problem-solving; the parietal lobe, which manages perception of stimuli related to touch, pressure, temperature, and pain; the temporal lobe, concerned with perception and recognition of auditory stimuli, memory, and speech; and the occipital lobe, dedicated to visual processing.The cerebellum is located under the cerebrum. Its main function is to coordinate muscle movements, maintain posture, and balance. This part of the brain is vital for performing activities that require fine motor skills, balance, and coordination, such as typing or playing a musical instrument.Connecting the brain to the spinal cord, the brain stem plays a crucial role in regulating vital life functions, including breathing, consciousness, and controlling heart rhythms. It is also responsible for various automatic functions necessary for survival, such as digestion and sleeping cycles.
On which bone does Zygomatic Process occurs?
Answer:
Zygomatic Process occurs on temporal bone.
Explanation:
Cheek bone is formed by the zygomatic process. Zygomatic process occurs anteriorly in front of mandibular fossa and posteriorly by external acoustic measles muscle.
Temporal bone is involved in the zygomatic process. The temporal bone extends towards the sides of the skull and lies over the opening of ear. The jugal point is present on the upper side of zygomatic arch.
Answer:
Temporal bone.
Explanation:
On the temporal bone, the Zygomatic Process occurs.
Carbon dioxide is transported by all the following means except
A. carbaminohemoglobin.
B. carbonic acid.
C. carbonate
D. bicarbonate ions.
Answer:
C. Carbonate
Explanation:
i juST KNOW
Carbondioxide is not transported through carbonate. That is option C.
Transportation of carbondioxideCarbon dioxide is a chemical compound that is made up of two oxygen atoms covalently bonded to a single carbon atom.
In the human body, carbondioxide can be transported through three following means;
As carbonic acid : Here it is dissolved directly in the blood.As carbaminohemoglobin: Here it is bound to plasma proteins or hemoglobin.As bicarbonate ions: Here it is converted into bicarbonate.They are not transported as carbonate but through bicarbonate.
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Acetyl co A can
A) Enter the citric acid (Krebs cycle)
B) Combine with another acetyl co A
C) Be converted to glycerol
D) Be converted to glycerol
E) Both a and b are correct
Answer:
Both a and b are correct.
Explanation:
Acetyl co A or acetyl coenzyme A is a chemical molecule that plays an important role in the biochemical reactions. This molecule acts as an intermediate molecule in various reactions.
Acetyl co A delivers the acetyl group in the citric acid cycle. Acetyl co A can also combine with another acetyl co A during the synthesis of fatty acid.
Thus, the correct answer is option (E).
Plzzzz help
As time goes by and water goes through the water cycle again and again, the amount of water
on Earth:
increases
decreases
Ostays the same
goes up and down
dominant over the mutant vermilion (bright red) allele. A homozygous wild-type female fly is mated with a vermilion male fly. Predict the eye colors of F1 and F2 generations. (Assume that the F1 flies are allowed to interbreed to produce the F2 generation.)
.................................................................
During the _______ phase, the muscle is returning to resting length.
Answer:
The correct answer is: Eccentric phase.
When talking about movement, we are talking about the activation of muscle fibers in order for this process to happen. In order for this to happen, motor neurons must activate the phases of muscle excitation, contraction and relaxation, so that the sarcomeres, and thus the fibers, can generate movement.
In essence, there are three stages, or phases, to complete muscle movement: the concentric phase, which is when the muscle fibers are excited and begin the process of contraction. This means the muscle fibers will contract and generate movement, generating a shortening. Then we have the isometric stage, a moment in which there is no longer any more shortening of the muscle fibers, so basically, the movement is held and there is no further contraction, but neither is there relaxation of the muscle fibers. Finally, we have the eccentric phase. This phase is characterized precisely because it is the moment when the muscles begin to return to their resting position.
During the rhythmic ativity of sleep, thalamocortical neuron activity __________thalamoreticular neuron activity, that in turn, __________thalamocortical activity.
a) activate, inhibits
b) inhibits, activates
c) activates, activates
d) inhibits, inhibits
Answer:
b) inhibits, activates
Explanation:
During the rhythmic ativity of sleep, thalamocortical neuron activity inhibits neuron activity, that in turn, activates thalamocortical activity.
What can increase/decrease the velocity of blood flow?
Answer:
you can read the article
Answer:
The total cross-sectional area of the blood vessels.
Explanation:
The total cross-sectional area of the blood vessels can increase/decrease the velocity of blood flow.
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Define depolarization.
Answer:
According to Dictionary.com, "depolarize" means:
a sharp division, as of a population or group, into opposing factions.the deposit of gases, produced during electrolysis, on the electrodes of a cell, increasing the resistance of the cell.Which two regions of the brain control respiration
a. Hypothalamus
b. Pons
c. Medulla oblongata
d. A and b
e. B and c
The medulla oblongata and the pons are involved in the regulation of the ventilatory pattern of respiration. So the answer is E.
It extends the vertebral column
a. Erector spinae
b. Vastus lateralis
Answer:
The Erector Spinae
Explanation:
It is the structure that marks the division between the right and left lobes of the liver.
Answer:
falciform ligament
Explanation:
Falciform ligament’s is the structure which divides the liver into two lobes – right and left. It is a sickle shaped structure which connects the ventral body wall to the liver. It is the remaining part of fetus’s ventral mesentery and consist of fat between its layers. It is situated at the anteroposterior plane and connect to the left lobe from its back.
In sheep, coat color is influenced by two genes. Gene A influences pigment production, while gene B produces black or brown pigment. If two heterozygous white sheep were crossed and offspring were produced in a ratio of 12 white sheep to 3 black sheep to 1 brown sheep, what are the genotypes of the offspring?
Answer:
White: A---
Black: aaB-
Brown: aabb
Explanation:
The given example represents dominant epistasis wherein the gene A masks the effect of gene B. Hence, all the genotypes having at least one copy of "A" allele will have white coat color (A---).
On the other hand, in absence of "A" allele, the "B" allele would be able to express itself. Hence, all the genotypes that have two copies of recessive "a" allele and atleast one "B" allele (aaB-) would have black coat color.
The brown coat color would be expressed in double homozygous recessive genotypes (aabb) only.
In sheep, when two heterozygous white sheep are crossed, resulting in a phenotypic ratio of 12 white:3 black:1 brown sheep, this demonstrates epistasis. White sheep could have various genotypes indicating a lack of pigment or color expression, black sheep would have AaBb genotype, and the rare brown sheep could be aaBB.
In the scenario described, where coat color in sheep is influenced by two genes - Gene A for pigment production and Gene B that decides the color of the pigment (black or brown), we observe an example of epistasis. Cross-breeding two heterozygous white sheep resulted in offspring with a phenotypic ratio of 12 white:3 black:1 brown. To understand the genotypes of the offspring, we must assign gene symbols. Let's say 'A' (dominant) allows pigment production, while 'a' (recessive) does not; and 'B' (dominant) codes for black pigment, while 'b' (recessive) results in brown pigment. The absence of A (aa genotype) results in white coat color regardless of the B gene's allele, which is an example of epistasis. Given the ratios, the probable genotypes for the offspring would be:
White sheep: aabb, Aabb, aaBb, or any combination where at least one gene lacks the dominant allele necessary for color expression.Black sheep: AaBb, which have the necessary alleles from each gene to produce pigment and determine it to be black.Brown sheep: aaBB, lacking the dominant A for pigment production but possessing the dominant B allele, resulting in brown pigment in the few cases where pigment is produced.This demonstrates the interaction between multiple genes in determining an organism's phenotype, specifically through the mechanism of epistasis.
protons and neutrons are found together in the part of the atom called the
The nucleus
the protons and neutrons are in the nucleus and the electrons revolve around the nucleus
Which nutrient is most closely related to the liver's ability to produce necessary clotting factors?
A) Iron
B) Vitamin E
C) Vitamin K
D) Folic Acid
Answer:
Vitamin K
Explanation:
Vitamin K is a fat soluble vitamin and plays an important role in the bone metabolism. Two important compounds of Vitamin K are Vitamin K1 and Vitamin K2.
Vitamin K is synthesized in the liver and helps in the coagulation of blood. Vitamin K acts as a coenzyme for vitamin K-dependent carboxylase. This enzyme is important for the synthesis of proteins that are involved in blood coagulation and bone metabolism.
Thus, the correct answer is option (C).
What is the function of the epiglottis?
Epiglottis is a small, movable "lid" which is present just above the larynx which prevent food and drink from entering the windpipe.
It allows air to pass into the larynx and lungs.
What is epiglottis?Epiglottis is present just above the larynx which at rest allow passage of air to into larynx and lungs.
It is a movable lid that protect the air passage.
When a person swallows the epiglottis folds backward to covet the entrance of the larynx so that food and drink can not enter the air passage.
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During swallowing, the epiglottis, a leaf-shaped piece of cartilage, covers the trachea to keep food and liquids out. It assumes a fundamental part in keeping up with the aviation route clear.
It is a piece of the larynx and capabilities to shield the windpipe from suctioned food. At the point when you swallow, the retrogressive movement of the tongue powers the epiglottis to close over the entry of the larynx, actually keeping food and fluids from entering the respiratory parcel. An in-depth look at how the epiglottis works is provided below: After gulping, the tongue pushes the food towards the pharynx.The pharynx and larynx move up, permitting the epiglottis to swing lower and cover the trachea.By covering the windpipe, the epiglottis redirects food and fluids into the throat, the right pathway to the stomach. On the off chance that any food figures out how to move toward the windpipe, it disturbs the larynx, setting off areas of strength for a reflex to remove the material, in this manner safeguarding the lungs.True or False. The most toxic of our metabolic wastes are nitrogenous wastes.
Metabolic wastes are substances left over from metabolic processes. The answer is true.
Nerve impulses from _________ will result in inspiration.
A. the ventral respiratory group
B. the chemoreceptor center
C. Broca's center
D. the preoptic nucleus of the hypothalamus
Answer:
the ventral respiratory group
Explanation:
The respiratory centers are present in the brain stem. Five major respiratory group are Dorsal respiratory group, Ventral respiratory group, Pontine respiratory group, Pneumotaxic center and Apneustic center.
Ventral respiratory group controls the process of respiration. The neurons of ventral respiratory group become active during forceful breathing and may result in inspiration.
Thus, the correct answer is option (A).
Answer:
A. the ventral respiratory group
Explanation:
Nerve impulses from the ventral respiratory group will result in inspiration.
The ventral respiratory group is a column of respiratory neurons divided into four subgroups.
An example of working memory is
a) the ability to recall an address from your childhood
b) the ability to remember a phone number you learned yesterday
c) the ability to repeat a task such as solving a 3-dimensional puzzle
d) the ability to remember a brief list of ingredients in a recipe and what to do with them
Answer: A
Explanation:
An example of working memory is the ability to remember a phone number you learned yesterday. Thus, the correct option is B.
What is Working memory?Working memory may be defined as the amount of information that can be stored in the mind and utilized in the execution of cognitive tasks. It is a part of short-term memory.
Working memory always deals with the remembrance of address, contact number, etc in the mind while listening to instructions on a specific topic that was made earlier in the past few days.
Therefore, the correct option for this question is B.
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37) The integrating center for neural control of blood pressure resides in theA) medulla oblongata.B) cerebellum.C) pons variolli.D) hypothalamus.E) cerebrum.
Answer:
Medulla oblongata
Explanation:
Medulla oblongata is found at the lower half of the brainstem continuous with the spinal cord. The medulla oblongata controls the center of vomiting, vasomotor centers for regulating heart rate, cardiac, respiratory and blood pressure. Furthermore, Medulla oblongata connects the higher levels of the brain to the spinal cord and also controls autonomic functions.
Answer:
The Medulla Oblongata
Explanation:
The Medulla has two regions which control heart beat rate ie the *Cardiac inhibitory center* which reduces the heart rate and the *Cardiac accelerator Center* which increases the heart rate thus having overall effect on the blood pressure.
An individual is infected with a pathogen that absorbs nutrients from its environment. In which category does this pathogen belong?
Answer: Fungi.
Explanation:
If a person is suffering from pathogen that derives nutrition from its environment then the pathogen belongs to kingdom fungi.
In case of fungal infections, fungus release enzyme out of their body and performs extracellular digestion and absorb nutrition from their environment.
As they do not have stomach, they need to digest the food before they can pass through the cell wall into hyphae.
Such kind of pathogens are Fungi.
Evolutionary trends between species are often studied in which discipline?
a. Comparative anatomy
b. Constructive anatomy
c. Compatible anatomy
d. Complex anatomy
Answer:
a. Comparative anatomy
Explanation:
Comparative anatomy is a discipline that aims to study the similarities and differences between anatomical structures of two or more species to determine their degree of kinship. Through this analysis it is possible to understand the modifications undergone by a species and to examine evolutionary evidence and adaptations for survival in a given environment. In short, comparative anatomy is the discipline that studies evolutionary trends between species.
A small, rounded depression on a bone that is meant for articulation is called a(n)
a. fossa
b. trochanter
c. tuberosity
d. condyle
e. foramen
Answer:
Condyle
Explanation:
The condyle is one of the outgrowth or projections present at the surface of the bone. The condyle is large and round in shape. It has a smooth articular surface and serves in joints formation. The condyle is present at the end of one bone and joins it with other bones.
Example: occipital condyles of occipital bone serve in joint formation with the first vertebra of the vertebral column.
A small, rounded depression on a bone that is meant for articulation is called a fossa. It is a hollow or depression that helps connect other structures like muscles or other bones.
Explanation:In the field of biology, specifically in the study of human or animal anatomy, a small, rounded depression on a bone that is meant for articulation is called a(n) fossa. This is a specific type of bone landmark, where other structures, such as muscles, tendons, or other bones, would connect. To help remember this, think of a 'fossa' as a hollow or depression in a bone that helps to form a joint. It's different from a trochanter, which is a large, rough projection, a tuberosity, which is a moderate protuberance where muscles and connective tissues attach, a condyle, that is a smooth, rounded articulating area, and a foramen, which is a hole that allows passage of nerves and or vessels.
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What is the consensual response (the response of the left eye)?
Answer:
Constriction of pupil of left eye in response to entry of bright light in right eye.
Explanation:
The consensual response is a reflex response towards the intensity of light. When the right eye is exposed to the bright light, there is constriction of its pupil mediated by iris to regulate the amount of light entering the eye ball. However, at the same time, the pupil size of the left eye is also reduced to limit the amount of light entering the eye. This response of the left eye towards the exposure of the right eye for bright light is called consensual response.
After compounds are absorbed through the villi of the small intestine: (a) They travel to the kidneys, which excrete absorbed, but unwanted water-soluble compounds (b) They travel to the kidneys, which screen for unwanted compounds that have been absorbed and begin to detoxify so they can be eliminated. (c) They travel to the liver, which excretes absorbed, but unwanted water-soluble compounds (d) They travel to the liver, which screens for unwanted compounds that have been absorbed and begins to detoxify so they can be eliminated.
Answer:
the answer is a.
Explanation:
the small intestine absorbs the nutrients in digested food, then the kidneys where the liquid waste is formed into urates for excretion.
The specific receptors responsible for rotation found in the semicircular canals is called
a. Ampulla
b. Vestibule
c. Auricle
d. Saccule
e. Crista
Answer:idn
Explanation:
In 1994, telomerase activity was discovered in human cancer cell lines. Although telomerase activity is rarely present in human somatic tissue, this discovery indicated that humans do contain the genes for telomerase proteins and telomerase RNA. Since inappropriate activation of telomerase may contribute to cancer, why do you think the genes coding for this enzyme have been maintained in the human genome throughout evolution?
Answer:
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Telomerase is crucial for cell division and immortality in specific cells. Its presence in the human genome is supported by its roles in cell proliferation, regeneration, and combating age-related diseases and cancer.
Telomerase is an enzyme responsible for maintaining and elongating telomeres, critical for cell division and immortality in certain cells.
The presence of telomerase genes in the human genome throughout evolution is thought to be maintained due to its role in cell proliferation, regeneration, and potential implications in age-related diseases and cancer.
While inappropriate telomerase activation can contribute to cancer, its essential function in certain cells for telomere length maintenance and cellular immortality justifies its presence in the human genome.
Involved in allergic and hypersensitivity reactions, SELECT ONE:
A. IgA
B. IgD
C. IgE
D. IgG
E. IgM
Answer: IgE
Explanation:
Allergic reactions and hypersensitivity are the reactions which are produced in the body due to the invasion of a foreign antigen. In response to the invasive antibodies are produced in the body. The IgE is the special antibody that is produce in response to the invasive antigens. These antibodies instruct the cells to produce substances which produces the allergic response in the body.