Question 1

Which of the following best describes the primary effectors of the somatic nervous system?

Accepted Answer

Skeletal muscle

Question 2

A patient is given a drug that blocks muscarinic receptors. Which of the following effects would most likely occur?

Accepted Answer

Increased heart rate due to inhibition of parasympathetic activity

Question 3

Which neurotransmitter is released by preganglionic fibers in both the sympathetic and parasympathetic divisions of the autonomic nervous system?

Accepted Answer

Acetylcholine (ACh)

Question 4

The sympathetic division of the autonomic nervous system originates from which region of the central nervous system?

Accepted Answer

Thoracolumbar region (T1-L2)

Question 5

Which receptor type is always stimulatory when activated by acetylcholine?

Accepted Answer

Nicotinic

Question 6

A patient with Raynaud’s disease experiences excessive vasoconstriction in response to cold. Which division of the autonomic nervous system is primarily responsible for this response?

Accepted Answer

Sympathetic

Question 7

Which of the following best describes the location of ganglia in the parasympathetic division?

Accepted Answer

Near or in the target organ

Question 8

Which of the following statements about dual innervation is correct?

Accepted Answer

Most organs receive input from both sympathetic and parasympathetic divisions, often with antagonistic effects

Question 9

Which of the following is a correct comparison between somatic and autonomic reflex arcs?

Accepted Answer

Autonomic reflex arcs involve two motor neurons, while somatic reflex arcs involve one

Question 10

A drug that mimics the effect of norepinephrine on beta-1 adrenergic receptors would most likely cause which of the following?

Accepted Answer

Increased heart rate and force of contraction

Question 11

Which of the following best describes the effect of the parasympathetic division on the gastrointestinal tract?

Accepted Answer

Stimulates motility and secretion

Question 12

Which structure allows preganglionic sympathetic fibers to enter the sympathetic trunk?

Accepted Answer

White rami communicantes

Question 13

A patient with autonomic dysreflexia is at risk for which of the following complications?

Accepted Answer

Severe hypertension

Question 14

Which of the following best describes the effect of the sympathetic division on the lungs?

Accepted Answer

Bronchodilation

Question 15

Which of the following is true regarding the control of the autonomic nervous system?

Accepted Answer

The hypothalamus is the main integration center for autonomic functions

Question 16

Which of the following is a characteristic of adrenergic fibers?

Accepted Answer

They release norepinephrine

Question 17

A patient is given a drug that inhibits acetylcholine breakdown at synapses. Which of the following effects would most likely be observed?

Accepted Answer

Increased parasympathetic activity, such as bradycardia and increased gastrointestinal motility

Question 18

Which of the following best describes the fiber pathway of the sympathetic division?

Accepted Answer

Short preganglionic fibers and long postganglionic fibers

Question 19

Which of the following is a correct statement about the enteric nervous system?

Accepted Answer

It is capable of functioning independently of the central nervous system

Question 20

A patient presents with persistent high blood pressure. Which of the following best explains how the autonomic nervous system may contribute to this condition?

Accepted Answer

Excessive sympathetic tone leads to vasoconstriction and increased blood pressure

Chapter 14 Objectives

Study Guide - Practice Questions

Study Guide - Flashcards