2730701
Descripción
Test por Tina Truong, actualizado hace más de 1 año
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Creado por Tina Truong
hace más de 9 años
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Pregunta 1
Pregunta
Which of the following is NOT a step in long - term potentiation of glutamertergic synapse?
Respuesta
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High frequency of action potentials in presynaptic cell
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Release of glutamate
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Glutamate binds to Na and Ca channels
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Na and Mg enter the post-synaptic cell
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Secondary messages induce long - lasting increase in glutamate receptors and sensitivity
Pregunta 2
Pregunta
If the thalamus was not functioning to its full capacity, which sense would be least affected?
Respuesta
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Olfactory
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Hearing
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Vision
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Vestibular
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Taste
Pregunta 3
Pregunta
In the presence of light, the bipolar cells will become _________ in the ON Pathway, while the bipolar cells would become____________ in the OFF Pathway.
Respuesta
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Hyperpolarize; Hyperpolarize
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Depolarized; Hyperpolarized
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Depolarize; Depolarize
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Hyperpolarize; Depolarize
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None of the above
Pregunta 4
Pregunta
If the lateral inhibition mechanism was not functional in your sensory system, which of the following would not occur?
Respuesta
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localization of a stimulus sit
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decrease in stimulus duration
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summation of afferent neuron action potentials
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amplification of a stimulus
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None of the above
Pregunta 5
Pregunta
If the hair cells in the ampulla of the ear were mutated, what would happens to the vestibular system?
Respuesta
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Loss of eye muscle control
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Loss of maintenance of upright posture and balance
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Loss of conscious awareness of the position or acceleration of the body
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None of the above
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All of the above
Pregunta 6
Pregunta
The sensation of pain in the left arm when one is having a heart attack is known as:
Respuesta
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Hyperalgesia
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b. Hypersensitivity
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c. Pain localization
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d. Referred Pain
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e. A mutation in the nociceptors
Pregunta 7
Pregunta
In order for the skeletal muscle fiber to relax _____ must occur.
Respuesta
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a. Hydrolysis of ATP by Na+/K+-ATPase in the plasma membrane
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b. Binding of ATP to myosin
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c. Hydrolysis of ATP by Ca2+-ATPase in the sarcoplasmic reticulum
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d. Hydrolysis of ATP by myosin
Pregunta 8
Pregunta
How does the excitation (depolarization) of the cardiac nodes flow through the atrial and
ventriole portions of the heart? (from start to finish)
Respuesta
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a. AV node, SA node, His bundle, Purkinje fibers
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b. SA node, Av node, His bundle, Purkinje fibers
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c. Av node, SA node, Purkinje fibers, His bundle
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d. SA node, AV node, Purkinje fibers, His bundle
Pregunta 9
Pregunta
In the cardiac system, decreasing blood pressure would also affect which of the following?
Respuesta
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a. increase net filtration pressure
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b. increase πC
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c. decrease net filtration pressure
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d. decrease πC
Pregunta 10
Pregunta
In the cardiac system, if arterial pressure is decreased, what is the body’s way to
compensate for this?
Respuesta
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there is a decrease in baroreceptor firing, which increases sympathetic response
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b. there is an increase in baroreceptor firing, which increases sympathetic response
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c. there is a decrease in baroreceptor firing, which increases parasympathetic response
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d. there is a decrease in baroreceptor firing, which decrease sympathetic response
Pregunta 11
Pregunta
When at the top of Mt. Everest, less oxygen is available and therefore PO2 levels are decreased. PO2 levels are sensed by the ________ which causes ________ firing and contraction of respiratory muscles which attempts to return PO2 levels back to normal.
Respuesta
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a. Central chemoreceptors, increased
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b. Peripheral chemoreceptors, increased
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c. Central chemoreceptors, decreased
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d. Peripheral chemoreceptors, decreased
Pregunta 12
Pregunta
Reduction in surfactant in the alveolar cells would:
Respuesta
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1) Decrease compliance within the lung, making it harder to expand
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2) Increase surface tension at the air-water interfaces within the alveoli
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3) Increase the cohesive forces between water molecules
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4) Increase compliance within the lung, making it harder to expand
Pregunta 13
Pregunta
The afferent arteriole in the kidney has dilated. What effects does this have on the P_GC (glomerular capillary pressure) and GFR (glomerular filtration rate)? (Figure 14.9)
Respuesta
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A. Decreased P_GC; increased GFR
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B. Increased P_GC; increased GFR
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C. Decreased P_GC; decreased GFR
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D. Increased P_GC; decreased GFR
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E. None of the above
Pregunta 14
Pregunta
If an individual experiences an increase in sodium and water reabsorption, it would result from which of the following:HC
Respuesta
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A. A decrease in aldosterone secretion
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B. An increase in aldosterone secretion
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C. A decrease in plasma angiotensin II
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D. An increase in arterial pressure
Pregunta 15
Pregunta
One of the negative feedback systems of high [HCl] in relation to cephalic and gastric control include:
Respuesta
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A. Gastrin secretion on the parietal cells
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B. Histamine secretion on the parietal cells
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*C. Somatostatin secretion on the parietal cells
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D. Luminal distension of amino acids and peptides
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E. Enteric neural activity on the parietal cells
Pregunta 16
Pregunta
How is increased acidity in the duodenum hormonally regulated?
Respuesta
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A. Increased neural activity affects the parietal cell to increase bicarbonate secretion.
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B. Bicarbonate is secreted from the small intestine, which causes the pancreas to secrete selectin.
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*C. Secretin is secreted from the small intestine, which causes the pancreas to secrete bicarbonate.
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D. CCK is secreted from the duodenum, inhibiting acid secretion from the stomach
Pregunta 17
Pregunta
What is the fate of ingested amino acids in excess of those needed to maintain a stable rate of protein turnover?
Respuesta
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a. Increase in body protein
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b. Converted to glycogen
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c. Converted to carbohydrate or fat
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d. Transported via the blood to adipose tissue
Pregunta 18
Pregunta
What is the first line of defense in the maintenance of the plasma glucose concentration within a homeostatic range?
Respuesta
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A. Hepatic glycogenolysis
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B. Increase GLUT-4 concentration
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Gluconeogenesis
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Lipolysis
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E. none of the above
Pregunta 19
Pregunta
The catabolism of triglycerides in adipose tissue yields what?
Respuesta
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A. Fatty acids only
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B. Glycerol only
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C. Fatty acids and glycerol
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D. Sterols and glycerol
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E. none of the above
Pregunta 20
Pregunta
A few hours into post absorptive state, through which pathway are proteins converted into glucose ?
Respuesta
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Glycolysis
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Gluconeogenesis
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C. Oxidative Phosphorylation
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D. Alpha-keto acid pathway
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E. none of the above
Pregunta 21
Pregunta
Besides plasma concentration of glucose, what other factors stimulate insulin secretion
Respuesta
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Incretins
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Exercise
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C. Increased amino acid concentration
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D. A and C
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E. All of the above
Pregunta 22
Pregunta
How does the liver respond to decreased levels of plasma insulin?
Respuesta
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a. Increase glucose release; increase ketone synthesis
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b. Increase glucose synthesis; Increase ketone release
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c. Decrease glucose release; decrease ketone synthesis
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d. Decrease glucose synthesis; decrease ketone release
Pregunta 23
Pregunta
In skeletal muscle, as insulin secretion increases,
Respuesta
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a) blood glucose increases
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b) blood fatty acids increase
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c) protein synthesis increases
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d) blood amino acids increase
Pregunta 24
Pregunta
Which factor(s) do NOT cause calorigenic effect
Respuesta
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Acetylcholine
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B. Thyroid hormones (T3 and T4)
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Epinephrine
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D. B and C
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E. None of the above
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