Answer:
c. The Yupik of Alaska have short, squat bodies to reatin heat
Explanation:
Acoording to Bergmann's and Allen's rules, the appearance of the humans directly depends on the environment in which they live. The main reason for this rules are that the humans have to develop certain advantageous traits in order to be able to survive in certain type of environment. The Yupik people of Alaska are a nice example of this. The climate in Alaska is very cold. There's lot of snow and long winters with freezing temperatures. The winds are also strong and cold. This has resulted in the Yupik people developing shorter bodies. They also became stockier, with wider chest, larger lung capacity, and also preserving fat below the eyes. These adaptations have been result of the environment, as the type of body they have helps in preserving the heat. The fat below the eyes helps prevent damage to the eyes from the cold, and the larger lung capacity helps them in breathing in colder air.
List the six primary sutures of the skull and the bones that articulate at each suture.
The six primary sutures of the skull are the coronal, sagittal, lambdoid, squamous, pterion, and fontanelles.
Explanation:The six primary sutures of the skull are:
Coronal suture: It joins the frontal bone to the right and left parietal bones.Sagittal suture: It unites the right and left parietal bones.Lambdoid suture: It joins the occipital bone to the right and left parietal and temporal bones.Squamous suture: It unites the squamous portion of the temporal bone with the parietal bone.Pterion: It is a small suture line region that unites the frontal bone, parietal bone, squamous portion of the temporal bone, and greater wing of the sphenoid bone.Fontanelles: These are areas of connective tissue between the bones in newborns and infants.Learn more about Skull sutures here:https://brainly.com/question/30403243
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Define metabolism, catabolism, and anabolism.
Hello There!
METABOLISM - In an organism, the metabolism converts food into energy. Another important thing it does is it gives you the energy you need every day in life.
CATABOLISM - This is the break down of molecules that are very small. Cells need nutrients because inside them, they contain energy. Catabolic reactions release the energy and then makes all the different substances available.
ANABOLISM - This is the building of organic compounds. Complex molecules are synthesized from molecules that are way more basic.
Orientation preference of straight-line stimuli across the primary visual cortex is arranged in a _______________ pattern.
a) cross
b) pinwheel
c) square
d) diffuse
Answer:
pinwheel
Explanation:
Orientation preference in the primary visual cortex is a prominent feature of higher mammals. The neurons are arranged in the fix orientation in a primary visual cortex.
The orientation map has analysed that there are pinwheel like orientation are arranged in the ordered fashion. Orientation preference of straight-line stimuli across the primary visual cortex is arranged in pinwheel pattern.
Thus, the correct answer is option (b).
From the list below, which event leads to activation of NF-κB?
Question 1 options:
A)
selectin binding
B)
S-Lex interactions
C)
integrin activation
D)
TLR activation
E)
ICAM activation
Answer:
(D) . TLR activation.
Explanation:
Nuclear factor kappa light chain enhancer of activated B cells (NF-κB) represents a protein complex, which plays various roles in activation of adaptive and innate immune response.
TLRs (toll-like receptors) are specific pattern recognition molecules found in pathogens that triggers immune responses. TLR activation stimulates activation of NF-κB signalling by triggering a downstream signaling cascades.
Activation of NF-κB signalling leads to upregulation of various pro-inflammatory substances or cytokines.
Thus, the correct answer is option (D).
Muscle that extends forearm at the elbow
a. Adductor magnus
b. Triceps brachii
Answer:
The muscle that extends forearm at the elbow is the triceps brachii
Hello There!
Triceps Brachii extends the forearm at the elbow joint.
This is a large muscle on back of upper limb.
Which of the following plasma proteins is responsible for attacking pathogens?
A. globulins
B. antibodies
C. albumins
D. fibrinogen
Answer:
The answer would be Antibodies.
Hope this helps!
Blood is an example of what major type of tissue.
Three main types of air pollution produced by power plants place in the georgia
can anyone help me in biology evolution ?
Answer:
1,4,5 is correct
Explanation:
To look at which species is more closely related to another, look at the number of intermediate ancestors between each species. The lesser the number of ancestor intermediates, the closer the relatedness the species is to the common ancestor.
As long as the species is in the phylogenetic tree, the species may share a common feature with the common ancestor
This is an abnormally low level of platelets.
A. thrombocytes
B. megakaryocytes
C. thrombocytosis
D. thrombocytopenia
Answer: D. thrombocytopenia
Explanation:
Thrombocytopenia is a condition that is characterized by abnormally low levels of thrombocytes (platelets) in the liquid blood. The condition is either acquired or inherited. The thrombocyte count may go below 50,000 per microliter which is extremely low.
The patients with this condition generally show no symptoms. Some individuals may experience external bleeding like nosebleeds, and bleeding gums. Some may experience spontaneous bleeding under the skin.
Part of the hamstrings
a. Zygomaticus
b. Semitendinosus
Final answer:
The semitendinosus is part of the hamstring group, which also includes the biceps femoris and semimembranosus, and is responsible for flexing the knee. So the correct option is b.
Explanation:
Among the options provided, b. Semitendinosus is part of the hamstrings. The posterior compartment of the thigh includes muscles that are responsible for flexing the leg and extending the thigh, known as the hamstring group. These muscles are the biceps femoris, semitendinosus, and semimembranosus. The tendons of these muscles form the popliteal fossa, which is a diamond-shaped space at the back of the knee. On the other hand, the zygomaticus major muscle is a paired facial muscle that extends between the zygomatic bone and the angle of the mouth.
Phasic receptors:
a. are quick to adapt to a particular stimulus intensity.
b. slowly decrease the frequency of action potentials generated to a constant stimulus.
c. are attune to parameters that the body must continuously assess.
d. once threshold is reached by a stimulus will always generate action potentials.
e. change their sensitivity in phases going from slow to fast.
Answer:
a. are quick to adapt to a particular stimulus intensity.
Explanation:
Phasic receptors are the one that first generates an action potential in response to the stimulus. However, they adapt to that intensity of the first stimulus and reduce signaling. Slowly, they even stop signaling irrespective of the presence of stimulus of the same intensity.
This is the reason that we get adapted to the specific odor such as gas leakage after some time even if the leakage continues.
New opening between two parts of the jejunum is called
A jejunostomy is a surgical procedure that creates a new opening between two parts of the jejunum, primarily to facilitate dietary intake directly into the intestinal tract or to bypass a diseased segment of the stomach or duodenum.
Explanation:The new opening or passageway created between two parts of the jejunum is called a Jejunostomy. The jejunum is the middle section of the small intestine, located between the duodenum and the ileum. A jejunostomy is performed primarily to facilitate the intake of nutrition directly into the intestinal tract or to bypass a diseased or blocked part of the stomach or duodenum during complex surgical procedures.
It is typically done in cases where the stomach can't adequately perform its role in digestion, due to conditions like stomach cancer or severe gastrointestinal disorders.
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The sensory cells associated with this sense actually hyperpolarize in response to their stimulus modality...
a) somatosense
b) gustation
c) audition
d) vision
Answer:
Vision
Explanation:
Sensory cells may detect the information like taste, touch, hear and vision by the presence of receptors located on their surface.
Hyperpolarisation may be defined as the change in the cell's membrane potential towards more negative. The sensory vision cells are associated with the hyperpolarisation of cells and makes the cells environment more negative in response to the stimuli.
Thus, the correct answer is option (d).
The formation of memories, the ability to make predictions, the mechanics of language, complex thought and analysis is primarily due to:
a. Corpus collosum
b. Thalamus
c. Cerebrum
d. Cerebellum
e. Arbor vitae
Answer:
c. Cerebrum
Explanation:
The cerebrum is the part of the brain that is responsible for processing the sensory information, critical thinking and learning. It stores this information and processing centers make predictions for various conditions. The Wernicke’s area and Broca’s area represent the areas of language present in the cerebral cortex and are associated with language and speech.
Have there been any unintended or adverse consequences of the use of chemical sleeping agents?
Answer:
Sleeping chemical agents can cause chronic insomnia and shows adverse consequences in an individual organism.
Explanation:
Sleeping pills or sleeping chemical agents belongs to the class psychoactive drugs and there main function is inducing sleep in an individual organism.
Sleeping chemical agents disturbs the sleeping pattern of an individual, loss of appetite, may leads to constipation and can cause chronic insomnia. Thus, there has been an adverse consequence on the use of chemical sleeping agents.
Chemical sleeping agents like barbiturates and benzodiazepines can disrupt the natural sleep cycle, leading to poor sleep quality and the risk of developing dependence. They can also cause adverse effects such as daytime drowsiness and cognitive issues.
Chemical sleeping agents such as barbiturates, benzodiazepines, and other sedatives have been associated with a range of unintended consequences.
While these substances are often prescribed as sleep aids, they have the potential to disrupt the natural sleep cycle, which may result in a reduction in the overall quality of sleep. Moreover, there's a risk that individuals who use these agents can develop a dependence, making it difficult for them to sleep without the medication.
In addition to interfering with sleep patterns, these medications may lead to other adverse effects, including daytime drowsiness, cognitive impairment, and an increased risk of falls, especially in the elderly. Because of these risks, many sleep medicine practitioners now advocate for non-pharmacological approaches, suggesting behavior and environmental changes and therapy for underlying issues before resorting to medication.
One historical example highlighting the dangers of pharmacological remedies is the case of thalidomide, which caused serious birth defects when taken by pregnant women to combat morning sickness. This highlights the importance of thoroughly understanding the potential consequences of drug use, which is not limited to sleep medications but extends to all psychoactive substances.
Hemoglobin is the protein that transports O2 through the blood from the lungs to the rest of the body. In doing so, each molecule of hemoglobin combines with four molecules of O2. If 1.30 g of hemoglobin combines with 1.99 mL of O2 at 37°C and 736 torr, what is the molar mass of hemoglobin?
Final answer:
By calculating the number of moles of oxygen and using the molar ratio of hemoglobin to oxygen, we can find the molar mass of hemoglobin to be 2159.77 g/mol.
Explanation:
Hemoglobin is a protein found in red blood cells that transports oxygen from the lungs to the rest of the body. Each molecule of hemoglobin can combine with four molecules of oxygen. To find the molar mass of hemoglobin, we can use the given information:
Mass of hemoglobin = 1.30 gVolume of oxygen = 1.99 mLTemperature = 37°CPressure = 736 torrTo calculate the molar mass, we need to use the ideal gas law equation PV = nRT. Rearranging the equation, we get n = PV/RT, where n is the number of moles of the gas, P is the pressure, V is the volume, R is the ideal gas constant, and T is the temperature in Kelvin.
First, let's convert the temperature to Kelvin: 37°C + 273.15 = 310.15 K.
Next, let's convert the volume to liters: 1.99 mL ÷ 1000 = 0.00199 L.
Now we can calculate the number of moles of oxygen using the ideal gas law: n = (736 torr)(0.00199 L) / (0.08206 L·atm/mol·K)(310.15 K) = 0.002405 mol.
Since each molecule of hemoglobin combines with four molecules of oxygen, the molar ratio of hemoglobin to oxygen is 1:4. Therefore, the number of moles of hemoglobin is 0.002405 mol ÷ 4 = 0.000601 mol.
Finally, to find the molar mass of hemoglobin, we divide the mass of hemoglobin by the number of moles: Molar mass = 1.30 g ÷ 0.000601 mol = 2159.77 g/mol.
Define Tidal Voulume and give its amount in ml:
Answer:
Amount of air inhaled or exhaled per breathing stroke is called as tidal volume. Tidal volume is 400 ml for women while for men it is 500 ml.
Explanation:
In respiration, tidal volume is defined as the volume of air that a person inhales or exhales in one stroke of normal breathing.
The tidal volume varies in adult men and women. In resting condition, tidal volume is 400 ml for women while for men it is 500 ml.
This tidal volume varies with the requirement of the body. During intense physical exercise the amount of gas intake increases in order to full fill the requirement of body and hence the tidal volume increases.
Where is the cribriform plate?
Answer:
Between the anterior cranial fossa and the nasal cavity.
Explanation:
The cribriform plate is between the anterior cranial fossa and the nasal cavity.
The cribriform plate is located in the cranial cavity, forming the roof of the nasal cavity and the floor of the anterior cranial fossa. It contains small openings for olfactory nerve branches to pass through to the brain and is part of the ethmoid bone.
Explanation:The cribriform plate is a vital structure located in the skull. It can be found in the cranial cavity, forming part of the floor of the anterior cranial fossa right at the midline, and serving as the roof of the nasal cavity. This structure is made up of small, flattened areas with many small openings, known as olfactory foramina, and is formed by the ethmoid bone.
The cribriform plate has a crucial role in the sense of smell. The olfactory foramina within the cribriform plate allow the nerve branches from the olfactory areas of the nasal cavity to pass through and enter the brain. Adjacent to this crucial plate is the crista galli, which is a small upward bony projection that functions as an attachment point for brain coverings.
Suppose that a thin-layer chromatography plate the solvent front migrates a distance of 14 cm, and two steroid spots move distances of (a) 6 cm and (b) 12 cm. Calculate the Rf values for each steroid.
Answer:
A) [tex]RF = 0.428[/tex]
B) [tex]RF = 0.857[/tex]
Explanation:
RF value in thin-layer chromatography plate is defined as the ratio of distance moved by the steroid spot (A) to the distance migrated by solvent front(B)
Hence, mathematically
[tex]RF = \frac{A}{B}[/tex] ------Equation (A)
a) Here [tex]A = 6[/tex] cm and [tex]B = 14[/tex]cm
Substituting the given values in above equation, we get -
[tex]= \frac{6}{14} \\= 0.428\\[/tex]
b) Here [tex]A = 12[/tex] cm and [tex]B = 14[/tex]cm
Substituting the given values in above equation, we get -
[tex]= \frac{12}{14} \\= 0.857\\[/tex]
The Rf values for the two steroids based on their migration distances in thin-layer chromatography are calculated to be 0.4286 for steroid (a) and 0.8571 for steroid (b).
Explanation:The question involves calculating the Rf values for two steroids based on their migration distances in thin-layer chromatography (TLC). The Rf value, which stands for retention factor, is calculated by dividing the distance the compound has traveled by the distance the solvent front has traveled.
For steroid (a) with a migration distance of 6 cm and a solvent front of 14 cm, the Rf value is calculated as:
Rf value for steroid (a) = distance migrated by steroid (a) / distance migrated by solvent front = 6 cm / 14 cm = 0.4286
For steroid (b) with a migration distance of 12 cm:
Rf value for steroid (b) = distance migrated by steroid (b) / distance migrated by solvent front = 12 cm / 14 cm = 0.8571
The corpus luteum will
a. degenerate into a corpus albicans if fertilization does not occur.
b. remain active if fertilization occurs.
c. produce luteinizing hormone to stimulate the uterus to enter the secretory phase.
d. A&B
e. A,B, & C
Answer:
Option (D).
Explanation:
Corpus luteum is a cluster of cell mass present in the ovary. Corpus luteum release hormones and play an important role in the female reproductive system.
Corpus luteum is degenerated into the corpus albicans if the egg is not fertilized by the sperm. During early pregnancy, corpus luteum releases the hormone progesterone. After 10 weeks of pregnancy corpus luteum starts decreasing in size.
Thus, the correct answer is option (D).
Name the membranous encasement surrounding the brain.
Answer:
Meninges
Explanation:
Meninges refer to the protective membranes that surround the brain. Dura mater is the outer most meninx which forms a tough and fibrous cover. Pia mater is the deepest meninx and represent the delicate layer of connective tissue. Present between pia mater and dura mater is the arachnoid mater. Together, dura mater, arachnoid mater and pia mater make a membranous encasement to cover the brain and protect it from any injury.
The membranous encasement surrounding the brain, known as the meninges, consists of three layers called the dura mater, arachnoid mater, and pia mater. Each layer serves to protect the brain and spinal cord.
Explanation:The membranous encasement surrounding the brain is called the meninges. It is composed of three layers of connective tissue: the dura mater, the arachnoid mater, and the pia mater.
The dura mater is the outermost layer and it serves as a strong protective sheath over the entire brain and spinal cord. It is anchored to the inner surface of the cranium and vertebral cavity.
The arachnoid mater forms a loose sac around the Central Nervous System (CNS) and beneath it is a thin, filamentous mesh called the arachnoid trabeculae, which resembles a spider web, hence the layer's name.
The pia mater is the innermost layer, fitting into every convolution of the CNS, and directly adjacent to the surface of the CNS itself.
Overall, these three layers serve to protect the brain and spinal cord from injury and also facilitate the circulation of cerebrospinal fluid.
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The Occlusal refers to what part of the tooth?
a. Surface of the tooth that faces away from the midline
b. Surface of the tooth that face the tongue
c. Chewing surface of all Posterior teeth
d. Biting edge of all Anterior teeth
Answer: c. Chewing surface of all Posterior teeth.
Explanation:
Teeth in animal and human body plays important role in beginning the simplification of complex food entity inside the mouth. It exhibit various surfaces for various purposes like cutting, chewing, and grinding.
Occlusal surface refers to the surface of the posterior tooth which performs the function of chewing and grinding.
The condition in which there are two complete sets of chromosomes in a cell is referred to as
a. haploid
b. diploid
c tetraploid
d. homeostasis
e. recombination
I believe the answer is b) diploid.
the prefix "di" means two. You could remember it that way :)
Which brain area is considered to be the integrating center for homeostasis?
a. hypothalamus
b. thalamus
c. pituitary gland
d. brain stem
e. medulla
Answer:
A
Explanation:
The hypothalamus is a portion of the brain particularly concerned with homeostasis; it influences the action of the medulla oblongata, a lower part of the brain, the autonomic nervous system, and the pituitary gland.
The hypothalamus is the brain area that is crucial in maintaining homeostasis. It regulates many bodily functions to keep a stable internal environment in response to changes in external conditions.
Explanation:The brain area that is considered to be the integrating center for homeostasis is the hypothalamus. Homeostasis refers to the body's ability to maintain a stable internal environment despite changes in external conditions. The hypothalamus plays a crucial role in homeostasis as it regulates various bodily functions including temperature, thirst, hunger, sleep, mood and the release of hormones from the pituitary gland. Examples of its functioning can be seen when body temperature rises, and it triggers sweat to cool down the body, or when it senses low water volume in the blood and causes a feeling of thirst, driving us to drink water.
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Describe the five categories of the vertebral column.
Answer:
The five categories of vertebral column are:
CervicalThoracicLumbarsacrumcoccyx.Explanation:
The 26 vertebrae of the spine or vertebral column are classified into five categories based on the structural differences between them. The first category is cervical and is made of seven cervical vertebrae. The spines of cervical vertebrae are shorter than that of others and have bifurcations.
The next category is the thoracic and is made of twelve thoracic vertebrae. Thoracic vertebrae are followed by lumbar region made up of 5 lumbar vertebrae. Spines of thoracic vertebrae are longer and are directed downwards while that of the lumbar vertebrae project towards the posterior region. the sacrum is present below the lumbar region and consists of five fused sacral vertebrae. The last category of spine is coccyx. It has four fused coccygeal vertebrae.
The vertebral column is divided into five regions: cervical, thoracic, lumbar, sacral, and coccygeal.
Explanation:The vertebral column, also known as the spine or backbone, is divided into five regions: cervical, thoracic, lumbar, sacral, and coccygeal. The cervical region consists of seven vertebrae, the thoracic region has twelve vertebrae, the lumbar region contains five vertebrae, the sacral region is composed of five fused sacral vertebrae, and the coccygeal region is made up of four fused coccygeal vertebrae.
Small, wandering cells that engulf cell debris and pathogens in the CNS are called
A) astrocytes.
B) satellite cells.
C) oligodendrocytes.
D) microglia.
E) ependymal cells.
Answer:
D. Microglia
Explanation:
Microglia are phagocytic, which means that they are cells that can engulf other cells and particles. Microglia protect the CNS by engulfing foreign particles and bacteria. They act also as a clean-up crew that help remove dead cells. They are found in both the brain and spinal cord, which make up the Central Nervous System, or the CNS.
Microglia are the small, wandering cells that engulf cell debris and pathogens in the Central Nervous System (CNS), which is a process called phagocytosis. They are immune cells with defensive functions in the CNS.
Explanation:Small, wandering cells that engulf cell debris and pathogens in the central nervous system (CNS), in a process called phagocytosis, are called microglia (D). These are immune cells with defensive functions, playing a critical role in the CNS's immune response. Unlike the astrocytes, which primarily provide biochemical support to endothelial cells that form the Blood-Brain Barrier and provision of nutrients to the nervous tissue, microglia are specialized immune cells that respond to any damage or invasion of pathogens in the CNS.
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An individual with type B blood can receive a blood transfusion of type B blood or?
A) type AB blood
B) type O blood
C) any Rh negative blood type
D) None of the above. They can only receive type B blood.
Answer:
The answer is B): type O blood.
Explanation:
If you have a B marker, your body will make A antibodies. Remember that an antibody is a blood protein that's produced in response to an antigen. Therefore, you can get a blood transfusion from someone with Type B or Type O blood, but not Type A or Type AB blood.
The area of a neuron that contains the nucleus and other organelles is called the ____________.
Answer: Cell body, Soma, or Perikaryon.
Explanation:
Neurons can vary in morphology but they keep 4 well-defined regions with distinct functions, they are: the Axon, the Axon terminals, Dendrites, and the cell body. To answer the question we are going to analyze the cell body. Because it contains the nucleus and other organelles, in this region we have the synthesis of practically all neuronal proteins and membranes, which gives it importance. Special transport processes involving microtubules move proteins and membranes from their sites of synthesis in the cell body down the length of the axon to the terminals.
What are the two main types of bone tissue?