Answer:
endosteum
Explanation:
The membrane surrounding a bone is the endosteum.
The membrane surrounding a bone is the endosteum.
Assuming a synapse is excitatory, which of the following would tend to strengthen a synapse? a. A drug that enhances reuptake of the transmitter b. An antagonist to the receptor c. A drug that blocks calcium entry into the presynaptic terminal d. A drug that inhibits an enzyme in the synaptic cleft that degrades the neurotransmitter
Answer:
C
Explanation:
calcium ions stimulate the release of acetylcholine
Excitatory synapse is defined as the in which the positive action potential is caused in the neurons and cells.
The correct answer is:
Option D. A drug that inhibits an enzyme in the synaptic cleft that degrades the neurotransmitter
Excitatory synapse can be explained as:
1. Excitatory synapse will be determined by the neurotransmitter if it is released from the presynaptic neuron. The neurotransmitter will inhibit or excite the receiving neuron.
2. The synapse can be strengthened by the drug that inhibits the synaptic cleft that degrades the neurotransmitter. The calcium influx triggers the synaptic vesicles to bind to the presynaptic membrane.
3. The action potential causes the release of ACh into the synaptic cleft that causes the conformational change in the membrane channels.
Thus, the correct answer is Option C.
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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).
You are examining another neuron, and find that it has two processes, both of which generate action potentials. What is the structural class of this neuron? How did you come to this conclusion?
Answer: This is a pseudounipolar neuron.
Explanation: A pseudounipolar neuron has two axons, a central process and a peripheral process. Both processes are capable of generating action potentials, and so both are axons.
Answer:
This is an example of the neurons named pseudounipolar in which the two axons a central process and a peripheral process.
A pseudounipolar neuron is a kind of neuron in which one extension can be seen coming out of its cell body.
This neuron has the ability to split into two branches. One branch can travel the peripheral nervous system and the other reaches the central nervous system.
This can be concluded because it has two place of processing one is central and other is peripheral.
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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Blood is an example of what major type of tissue.
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.
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.
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 :)
The H zone contains only _____ filaments.
Answer:
Thick
Explanation:
The H zone contains only thick filaments. :)
Answer:
The H zone contains only Thick filaments.
Explanation:
H zone The region of a striated muscle fibre that contains only thick (myosin) filaments. The H zone appears as a lighter band in the middle of the dark A band at the centre of a sarcomere. "H zone."
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).
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).
Which of the following is a "characteristic" of the sympathetic division
a. Urination
b. Excitement
c. Digestion
d. Defecation
e. Salivation
Answer:
Excitement
Explanation:
Sympathetic nervous system is a type of autonomic nervous system that acts as an emergency system of the body.
Sympathetic nervous system prepares the body during fight and flight response. The energy is put out in this system and protects the body from the injury. During excitement the heart speeds up, blood pressure increases and more energy is available to the body. Hence, excitement is the characteristic of sympathetic division of nervous system.
Thus, the correct answer is option (b).
Which of the following pairs is not correctly matched?
a. I band - contains only thin filaments
b. Z disc - marks the each end of the sarcomere
c. H zone - contains only thick filaments sarcomere
d. A band - light central region of sarcomere
The H zone is incorrectly matched with containing only thick filaments.
Explanation:The pair that is not correctly matched is c. H zone - contains only thick filaments sarcomere. The H zone actually contains both thick and thin filaments. The correct pairing for the other options are:
a. I band - contains only thin filamentsb. Z disc - marks the each end of the sarcomered. A band - light central region of sarcomereLearn more about sarcomere structure here:https://brainly.com/question/34217035
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The pair that is not correctly matched is 'd. A band - light central region of sarcomere', as the A band is actually a region that overlaps the thin and thick filaments and is generally a darker region.
Explanation:The question asks which of the provided pairs, related to muscle structure, is not correctly matched. The correct answer is d. A band - light central region of sarcomere. Sarcomeres, the fundamental units of muscle contraction, have various components: the I band contains only thin filaments, the Z disc marks each end of a sarcomere, and the H zone has only thick filaments.
However, the A band is not the light central region of the sarcomere; rather, it is a region that overlaps the thin and thick filaments and is generally a darker region.
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Three main types of air pollution produced by power plants place in the georgia
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.
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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In a healthy person, which of the following will have the greatest influence on resistance to pulmonary airflow?
A. atmospheric pressure
B. respiratory rate
C. bronchiole diameter
D. quantity of surfactant
Bronchiole diameter would have the greatest influence. Option c answer this question.
Several factors are the determinants of air resistance in a healthy person. These factors are
The diameter of the AirwayThe velocity of the air flowing inProperties of the air that is breathed.The most total resistance is known to occur in the trachea or in the larger bronchi.
The resistance is caused by those factors that could reduce the airway or the factors that widen it.
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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
True or False. The carotid sinus reflex protects the blood supply to the brain, whereas the aoric reflex is more concemed with maintaining adequate blood in the systemic circuit as a whole.
Answer:
True.
Explanation:
Carotid sinus is present at the base of internal carotid artery. Carotid sinus reflex is controlled by autonomic nervous system. The main function of carotid sinus reflex is to prevent the blood supply in the brain.
Aortic arc is located between the ascending and descending aorta. Aortic reflex may be defined as the the fall in blood pressure due to cardiac inhibition and peripheral dilation. The aortic reflex maintains the adequate flow of blood in systemic circuit as whole.
Thus, the given statement is true.
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.
If GFR is 125 ml/min, and you are studying a drug that has a renal clearance rate of 20 ml/min, you can conclude that
A. The drug is secreted
B. The drug is reabsorbed
C. The drug is neither secreted nor reabsorbed
Answer:
(B). The drug is reabsorbed.
Explanation:
Renal clearance rate determines the excretion of drugs into the urine during excretion. It is used to study the main process associated with a drug's renal excretion.
When the renal clearance rate is lower than GFR (glomerulus filtration rate), the drug is absorbed in the renal tubules. When the renal clearance rate is higher than GFR, the drug is secreted into the urine. When the renal clearance rate is equal to the GFR, the drug is neither reabsorbed nor secreted.
As for given drug, renal clearance is 20 ml/min (less than GFR), this drug will reabsorbed.
Thus, the correct answer is option (B).
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.
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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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.
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.
Where is the information stored in the DNA?
Answer:
he genetic information is stored in the chemical structure of the DNA.
Explanation:
Common lymphoid precursor cells give rise to:
Question 10 options:
(A) B cells, neutrophils, and T cells
(B) T cells, neutrophils, and NK cells
(C) NK cells, T cells, and macrophages
(D) B cells, T cells, and monocytes
(E) none of these lists are correct
Answer:
The correct answer will be option E (none of these lists are correct).
Explanation:
Common lymphoid progenitor cells or CLP are the cells which produces all types of lymphocytes in body which are T-lineage cells, B-lineage cells, natural killer (NK) cells and dendrite cells.
CLP differentiates into lymphocytes: CLP
↓
lymphoblast
↓
pro-lymphocyte
The pro-lymphocytes divides to form T-cell, B-cell, natural killer (NK) cells and dendrite cells.
Thus, option E none of these lists are correct is the correct answer.
Common lymphoid precursor cells give rise to B cells, T cells, and NK cells, which are key components of the immune system. B cells mature in the bone marrow, and T cells mature in the thymus, while NK cells are part of the innate immune response. The correct option is A.
Common lymphoid precursor cells give rise to a class of leukocytes known as lymphocytes, which include B cells, T cells, and natural killer (NK) cells. These cells are integral to the adaptive immune system, providing the body with the capability to respond to diverse infections and malignancies. B cells mature in the bone marrow, while T cells migrate and mature in the thymus. Natural killer cells are involved in the innate immune response, attacking a variety of infectious microbes and certain tumor cells.
Given the options provided, the correct choice is (A) B cells, T cells, and NK cells. This selection accurately represents the derivatives from the common lymphoid precursor.
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 ion has the intracellular concentration?
A. Bicarbonate
B. Chloride
C. Potassium
D. Sodium
Answer: The answer is potassium. Its the major ion in the intracellular region.
Explanation: Extracellulary, Sodium is major ion. Intracellular concentration of sodium is: 12 mEq/L Extracellular concentration of sodium is: 140 mEq/L Intracellularly, Potassium is major ion.
In which of the following would blood pressure be the lowest?
a. large arteries
b. large veins
c. capillaries
d. arterioles
Answer:
B. Large veins.
Explanation:
The blood always flows from the region of higher to the region of lower blood pressure. The blood is pumped from the heart into the arteries with the highest pressure and moves to arterioles, capillaries, venule and finally to veins. Since large veins such as superior and inferior vena cava collect the deoxygenated blood from body parts, they have the lowest blood pressure.