ANS Flashcards
Which of the following is correct regarding the autonomic nervous system (ANS)?
C. The neurotransmitter at the sympathetic ganglion is acetylcholine (ACh).
3.2 Which of the following is correct regarding somatic motor neurons?
D. Somatic motor neurons do not have ganglia
3.3 Which of the following physiological changes could happen when a person is attacked by a grizzly
bear?
A. Increase in heart rate.
3.4 Which of the following changes could theoretically happen in a person when the parasympathetic system is inhibited using a pharmacological agent?
D. Dry mouth (xerostomia).
3.5 Which of the following statements is correct regarding the sympathetic and parasympathetic systems?
A. Acetylcholine activates muscarinic receptors.
3.6 Which of the following statements concerning the parasympathetic nervous system is correct?
C. The parasympathetic division is involved in accommodation of near vision, movement of food, and urination.
3.7 Which of the following is correct regarding neurotrans mitters and neurotransmission?
A. Neurotransmitters are released from the presynaptic nerve terminals.
3.8 An elderly man was brought to the emergency room
after he ingested a large quantity of carvedilol tablets, a drug that blocks α1, β1, and β2
adrenergic receptors, which mainly mediate the cardiovascular effects of epinephrine and norepinephrine in the body. Which of the following symptoms would you expect in this patient?
B. Reduced heart rate (bradycardia).
3.9 All of the following statements regarding central control of autonomic functions are correct except:
B. The parasympathetic system is activated by the CNS in response to a sudden drop in blood pressure.
3.10 Which of the following is correct regarding membrane receptors and signal transduction?
A. ANS neurotransmitters bind to membrane receptors
on the effector cells, which leads to intracellular
events.