Select the incorrect statement about the parasympathetic nervous system.
a. It signals cardiac muscle and smooth muscle.
b. Its postganglionic fibers release norepinephrine.
c. Its preganglionic fibers release ACh.
d. Part of it originates in the brain.
e. Part of it originates in the sacral region of the spinal cord.
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Question 2) The glucose concentration in the plasma when glucose first starts to appear in the urine is about____ mg per 100 ml.
a. 30
b. 60
c. 100
d. 150
e. none of the above
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Question 3) Which of the following does not characterize the sympathetic nervous system?
a. It promotes responses that prepare the body for strenuous physical activity.
b. It is part of the autonomic nervous system.
c. It has norepinephrine as its postganglionic neurotransmitter.
d. It is always excitatory (that is, it increases the activity in every tissue it innervates).
e. It is part of the efferent division of the peripheral nervous system.
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Question 4) The normal glucose concentration in the plasma is about____ mg per 100 ml.
a. 30
b. 60
c. 100
d. 180
e. 250
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Question 5) The sympathetic nervous system
a. is part of the somatic nervous system.
b. has cholinergic preganglionic and adrenergic postganglionic fibers.
c. originates in the thoracic and lumbar regions of the spinal cord.
d. both (b) and (c) above.
e. all of these answers.
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Question 6) The juxtaglomerular apparatus
a. secretes renin in response to sodium depletion or plasma volume reduction.
b. is a thickened region of specialized cells at a point where the distal tubule comes into intimate contact with the afferent and efferent arterioles of the same nephron.
c. is where reabsorption of sodium occurs.
d. both (a) and (b) above.
e. all of these answers.
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Question 7) The parasympathetic nervous system
a. has long preganglionic fibers that end on terminal ganglia, which lie in or near the effector organ.
b. dominates in quiet, relaxed situations.
c. releases a postganglionic neurotransmitter that binds with muscarinic receptors.
d. both (a) and (b) above.
e. all of these answers.
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Question 8) Which of the following is true of potassium ions?
a. they are actively secreted in the proximal tubule
b. their concentration is controlled by aldosterone
c. changes in concentration can affect membrane excitability
d. are reabsorbed in the distal tubule
e. both (b) and (c)
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Question 9) Parasympathetic postganglionic fibers
a. arise from the ganglion chain located along either side of the spinal cord.
b. are cholinergic.
c. secrete norepinephrine.
d. both (a) and (b) above.
e. both (a) and (c) above.
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Question 10) Select the major waste product of nitrogen metabolism.
a. plasma proteins.
b. urea.
c. glucose.
d. PO4.
e. amino acids.
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