• Question 1
2.5 out of 2.5 points
Which of these is not true about the somatic motor nervous system?
Selected
Answer:
b. Each pathways consists of 2 neurons
(preganglionic and postganglionic)
Correct
Answer:
b. Each pathways consists of 2 neurons
(preganglionic and postganglionic)
• Question 2
2.5 out of 2.5 points
Which autonomic receptor mediates secretion of epinephrine by
the adrenal medulla?
Selected
Answer:
e. Cholinergic nicotinic receptors
Correct
Answer:
e. Cholinergic nicotinic receptors
• Question 3
2.5 out of 2.5 points
Which of the following is/are characteristic(s) of the
parasympathetic nervous system, but not of the sympathetic
nervous system:
Selected
Answer:
a. ganglia in or near target tissues
Correct
Answer:
a. ganglia in or near target tissues
• Question 4
2.5 out of 2.5 points
A 42-year-old woman with elevated blood pressure, visual disturbances,
and vomiting has increased urinary excretion of 3-methoxy-4-
hydroxymandelic acid (VMA). A computerized tomographic scan shows an
adrenal mass that is consistent with a diagnosis of pheochromocytoma.
While awaiting surgery to remove the tumor, she is treated with
phenoxybenzamine to lower her blood pressure. What is the mechanism
of this action of the drug?
Selected
Answer:
d. Decreasing IP3/Ca2+ (E) Opening Na+/K+ channels
Correct
Answer:
d. Decreasing IP3/Ca2+ (E) Opening Na+/K+ channels
• Question 5
2.5 out of 2.5 points
The sympathetic postganglionic neurons release only norepinephrine
while the adrenal medulla secretes mainly epinephrine (80%) and a small
, amount of
2.5 out of 2.5 points
Which of these is not true about the somatic motor nervous system?
Selected
Answer:
b. Each pathways consists of 2 neurons
(preganglionic and postganglionic)
Correct
Answer:
b. Each pathways consists of 2 neurons
(preganglionic and postganglionic)
• Question 2
2.5 out of 2.5 points
Which autonomic receptor mediates secretion of epinephrine by
the adrenal medulla?
Selected
Answer:
e. Cholinergic nicotinic receptors
Correct
Answer:
e. Cholinergic nicotinic receptors
• Question 3
2.5 out of 2.5 points
Which of the following is/are characteristic(s) of the
parasympathetic nervous system, but not of the sympathetic
nervous system:
Selected
Answer:
a. ganglia in or near target tissues
Correct
Answer:
a. ganglia in or near target tissues
• Question 4
2.5 out of 2.5 points
A 42-year-old woman with elevated blood pressure, visual disturbances,
and vomiting has increased urinary excretion of 3-methoxy-4-
hydroxymandelic acid (VMA). A computerized tomographic scan shows an
adrenal mass that is consistent with a diagnosis of pheochromocytoma.
While awaiting surgery to remove the tumor, she is treated with
phenoxybenzamine to lower her blood pressure. What is the mechanism
of this action of the drug?
Selected
Answer:
d. Decreasing IP3/Ca2+ (E) Opening Na+/K+ channels
Correct
Answer:
d. Decreasing IP3/Ca2+ (E) Opening Na+/K+ channels
• Question 5
2.5 out of 2.5 points
The sympathetic postganglionic neurons release only norepinephrine
while the adrenal medulla secretes mainly epinephrine (80%) and a small
, amount of
