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Autonomic Nervous System – Quiz 1

Question 1 of 15

The 'fight-or-flight' system is the _____ nervous system.

Select one answer.

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Autonomic Nervous System – Quiz 1 Practice Questions

Review these Autonomic Nervous System – Quiz 1 nursing practice questions with answer choices and explanations.

Question 1

The 'fight-or-flight' system is the _____ nervous system.

  1. parasympathetic
  2. somatic
  3. sympathetic
  4. central
View answer and explanation

Correct answer:

  1. sympathetic

Explanation: The sympathetic nervous system activates fight-or-flight.

Question 2

The sympathetic division of the ANS has:

  1. long postganglionic axons
  2. norepinephrine as neurotransmitter
  3. both of the choices are correct
  4. short preganglionic axons only
View answer and explanation

Correct answer:

  1. both of the choices are correct

Explanation: Sympathetic neurons have long postganglionic axons and use norepinephrine.

Question 3

Which type of innervation causes reduced blood flow to the digestive tract?

  1. Parasympathetic
  2. Sympathetic
  3. Somatic
  4. Central
View answer and explanation

Correct answer:

  1. Sympathetic

Explanation: Sympathetic activation reduces blood flow to digestion.

Question 4

Which is not characteristic of the parasympathetic division of the ANS?

  1. Long postganglionic axons
  2. Long preganglionic axons
  3. No rami communicantes
  4. Terminal ganglia close to the target organ
View answer and explanation

Correct answer:

  1. Long postganglionic axons

Explanation: Parasympathetic has short postganglionic fibers.

Question 5

The sympathetic and parasympathetic systems have _____ effects on heart rate.

  1. antagonistic
  2. cooperative
  3. synergistic
  4. additive
View answer and explanation

Correct answer:

  1. antagonistic

Explanation: They have opposite effects.

Question 6

Which type of innervation causes pupil dilation?

  1. Parasympathetic
  2. Sympathetic
  3. Somatic
  4. None
View answer and explanation

Correct answer:

  1. Sympathetic

Explanation: Sympathetic dilates pupils.

Question 7

Which statement accurately compares the SNS and ANS motor systems?

  1. Both use ganglia
  2. SNS has no ganglia but ANS does
  3. ANS has no ganglia but SNS does
  4. Neither uses ganglia
View answer and explanation

Correct answer:

  1. SNS has no ganglia but ANS does

Explanation: ANS uses ganglia, SNS does not.

Question 8

Muscarinic receptors are proteins that bind the neurotransmitter _____.

  1. acetylcholine
  2. epinephrine
  3. norepinephrine
  4. dopamine
View answer and explanation

Correct answer:

  1. acetylcholine

Explanation: Muscarinic receptors bind ACh.

Question 9

The micturition reflex results in:

  1. bladder contraction and sphincter relaxation
  2. intestinal contraction
  3. heart rate decrease
  4. urine retention
View answer and explanation

Correct answer:

  1. bladder contraction and sphincter relaxation

Explanation: Parasympathetic causes urination.

Question 10

When neurotransmitter binds to muscarinic receptors in the GI tract:

  1. motility increases
  2. motility decreases
  3. no change
  4. stops secretion
View answer and explanation

Correct answer:

  1. motility increases

Explanation: Parasympathetic increases motility.

Question 11

Motor neurons of the autonomic nervous system:

  1. always excite
  2. always inhibit
  3. can excite or inhibit
  4. do nothing
View answer and explanation

Correct answer:

  1. can excite or inhibit

Explanation: Depends on receptor type.

Question 12

Postganglionic axons are:

  1. myelinated
  2. unmyelinated
  3. both
  4. none
View answer and explanation

Correct answer:

  1. unmyelinated

Explanation: They are unmyelinated.

Question 13

Nicotinic receptors bind:

  1. ACh and allow Na+ entry
  2. ACh and allow Cl- exit
  3. muscarine
  4. norepinephrine
View answer and explanation

Correct answer:

  1. ACh and allow Na+ entry

Explanation: They are ligand-gated Na+ channels.

Question 14

The first neuron in an autonomic pathway is:

  1. preganglionic
  2. postganglionic
  3. terminal
  4. posterior
View answer and explanation

Correct answer:

  1. preganglionic

Explanation: It starts in the CNS.

Question 15

Which system engages in mass activation?

  1. Parasympathetic
  2. Sympathetic
  3. Somatic
  4. Central
View answer and explanation

Correct answer:

  1. Sympathetic

Explanation: Sympathetic spreads widely.