Question 1

Which of the following best describes the primary function of the autonomic nervous system (ANS)?

Accepted Answer

Control of involuntary bodily functions such as heart rate and digestion

Question 2

The ANS is divided into two principal divisions. Which of the following correctly identifies them?

Accepted Answer

Sympathetic and parasympathetic divisions

Question 3

Which neurotransmitter is primarily released by postganglionic neurons of the sympathetic division of the ANS?

Accepted Answer

Norepinephrine

Question 4

A patient presents with a rapid heart rate and dilated pupils after a car accident. Which division of the ANS is most likely activated?

Accepted Answer

Sympathetic division

Question 5

Which of the following best describes the anatomical organization of the parasympathetic division of the ANS?

Accepted Answer

Long preganglionic fibers and short postganglionic fibers

Question 6

Which cranial nerve is NOT involved in carrying parasympathetic fibers?

Accepted Answer

Trigeminal nerve (CN V)

Question 7

A drug that blocks muscarinic receptors would most directly affect which division of the ANS?

Accepted Answer

Parasympathetic division

Question 8

Which of the following is a correct pathway for sympathetic preganglionic fibers?

Accepted Answer

Originate in the thoracolumbar region and synapse in the paravertebral ganglia

Question 9

Which of the following equations correctly represents the relationship between heart rate ($$HR$$), stroke volume ($$SV$$), and cardiac output ($$CO) as $$regulated by the ANS?

Accepted Answer

$$CO = HR 	imes SV$$

Question 10

Stimulation of the parasympathetic division typically results in which of the following effects?

Accepted Answer

Decreased heart rate and increased digestive activity

Question 11

Which of the following best explains the difference in neurotransmitter release between sympathetic and parasympathetic postganglionic neurons?

Accepted Answer

Sympathetic postganglionic neurons release norepinephrine, while parasympathetic release acetylcholine

Question 12

A patient is experiencing excessive sweating and increased blood pressure. Which division of the ANS is most likely responsible?

Accepted Answer

Sympathetic division

Question 13

Which of the following is a correct description of the location of sympathetic preganglionic neuron cell bodies?

Accepted Answer

Thoracolumbar region of the spinal cord

Question 14

Which of the following scenarios best illustrates the antagonistic effects of the sympathetic and parasympathetic divisions?

Accepted Answer

Sympathetic stimulation increases heart rate, while parasympathetic stimulation decreases heart rate

Question 15

Which of the following is NOT a typical effect of sympathetic activation?

Accepted Answer

Increased digestive activity

Question 16

Which of the following best describes the role of the enteric nervous system in relation to the ANS?

Accepted Answer

It operates independently but is modulated by both sympathetic and parasympathetic divisions

Question 17

Which of the following equations represents the effect of sympathetic stimulation on blood pressure ($$BP$$), given cardiac output ($$CO) $$and total peripheral resistance ($$TPR$$)?

Accepted Answer

$$BP = CO 	imes TPR$$

Question 18

Which of the following is a correct statement about the functional organization of the ANS?

Accepted Answer

The ANS regulates smooth muscle, cardiac muscle, and glands

Question 19

Which of the following best describes the effect of parasympathetic stimulation on the eye?

Accepted Answer

Pupil constriction

Question 20

A patient is given a medication that inhibits acetylcholinesterase. What effect would this have on the parasympathetic division?

Accepted Answer

Increased acetylcholine levels and enhanced parasympathetic activity

The Autonomic Nervous System: Structure, Function, and Organization

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