Q: Which equation best represents the relationship between the divisions of the Peripheral Nervous System (PNS)?

$$PNS = \text{Somatic NS} + \text{Autonomic NS}$$

Question 1

Which of the following best describes the main function of the Autonomic Nervous System (ANS)?

Accepted Answer

To monitor and respond to internal and external environments, maintaining homeostasis

Question 2

A patient is experiencing increased heart rate, dilated pupils, and decreased digestive activity after a car accident. Which division of the ANS is most active?

Accepted Answer

Sympathetic division

Question 3

Which neurotransmitter is released by all preganglionic neurons in both the sympathetic and parasympathetic divisions of the ANS?

Accepted Answer

Acetylcholine

Question 4

What is the effect of acetylcholine binding to nicotinic receptors on postganglionic neurons?

Accepted Answer

Excitatory, causing depolarization

Question 5

Which of the following correctly matches the receptor type with its neurotransmitter and possible effect?

Accepted Answer

Nicotinic receptor – Acetylcholine – always excitatory

Question 6

A drug blocks beta-adrenergic receptors. What physiological effect would you expect during a stressful event?

Accepted Answer

Decreased heart rate and contractility

Question 7

Which pathway correctly describes the number and type of neurons from the CNS to an effector in the autonomic nervous system?

Accepted Answer

Two neurons: a lightly myelinated preganglionic neuron and an unmyelinated postganglionic neuron

Question 8

Which of the following is TRUE regarding the effect of neurotransmitters in the ANS?

Accepted Answer

The effect depends on the type of receptor present on the effector

Question 9

During the 'rest and digest' response, which of the following changes would occur in the gastrointestinal tract?

Accepted Answer

Increased motility and secretion

Question 10

Which equation best represents the relationship between the divisions of the Peripheral Nervous System (PNS)?

Accepted Answer

$$PNS = 	ext{Somatic NS} + 	ext{Autonomic NS}$$

Question 11

A patient is given a medication that stimulates muscarinic receptors. Which of the following is a likely effect?

Accepted Answer

Bronchoconstriction

Question 12

Which of the following statements about adrenergic receptors is correct?

Accepted Answer

Adrenergic receptors can be excitatory or inhibitory depending on the target tissue

Question 13

Which of the following best explains why the ANS is essential for homeostasis?

Accepted Answer

It continuously adjusts organ function in response to internal and external changes

Question 14

Which of the following is a correct sequence for the transmission of a signal in the autonomic nervous system?

Accepted Answer

CNS → preganglionic neuron → ganglion → postganglionic neuron → effector

Question 15

Which of the following is NOT a function of the sympathetic division of the ANS?

Accepted Answer

Stimulating digestive activity

Question 16

If a person is exposed to a bear and experiences the 'fight or flight' response, which neurotransmitter is primarily released at the effector organs?

Accepted Answer

Norepinephrine

Question 17

Which of the following is TRUE regarding the somatic and autonomic nervous systems?

Accepted Answer

Somatic is voluntary and uses one neuron; autonomic is involuntary and uses two neurons

Question 18

Which of the following best describes the effect of acetylcholine binding to muscarinic receptors?

Accepted Answer

Can be excitatory or inhibitory depending on the organ

Question 19

A patient with damage to the postganglionic neurons of the parasympathetic division would most likely experience which symptom?

Accepted Answer

Increased heart rate and decreased digestive activity

Question 20

Which of the following equations correctly represents the relationship between afferent and efferent divisions in the nervous system?

Accepted Answer

$$	ext{Nervous System} = 	ext{Afferent Division} + 	ext{Efferent Division}$$

The Autonomic Nervous System: Structure, Function, and Clinical Relevance

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