Q: Which equation best represents the neurotransmitter release at both synapses in the pathway shown in the image?

$$\text{Preganglionic neuron} \xrightarrow{ACh} \text{Postganglionic neuron} \xrightarrow{ACh} \text{Effector}$$

Question 1

Which division of the autonomic nervous system is illustrated in the image, based on the neurotransmitter released at both the preganglionic and postganglionic synapses?

Accepted Answer

Parasympathetic division

Question 2

In the pathway shown in the image, which neurotransmitter is released at both synapses?

Accepted Answer

Acetylcholine

Question 3

Based on the image, which type of receptor would be found on the postganglionic neuron receiving acetylcholine from the preganglionic neuron?

Accepted Answer

Nicotinic receptor

Question 4

If the postganglionic axon in the image innervates cardiac muscle, what effect would acetylcholine binding to muscarinic receptors likely have?

Accepted Answer

Decrease heart rate

Question 5

Which of the following best describes the fiber types shown in the image?

Accepted Answer

Both fibers are cholinergic

Question 6

What is the primary function of the pathway shown in the image within the autonomic nervous system?

Accepted Answer

Promote maintenance functions ('rest and digest')

Question 7

If a drug blocks the muscarinic receptors at the effector site shown in the image, which of the following effects would most likely occur?

Accepted Answer

Reduced parasympathetic effects on target organs

Question 8

Which cranial nerve is responsible for carrying about 90% of the preganglionic parasympathetic fibers depicted in the image?

Accepted Answer

Vagus nerve (X)

Question 9

If the pathway shown in the image innervates the eye, which ganglion would contain the cell bodies of the postganglionic neuron?

Accepted Answer

Ciliary ganglion

Question 10

Which of the following statements about the pathway shown in the image is correct?

Accepted Answer

The preganglionic axon is long and the postganglionic axon is short

Question 11

Which equation best represents the neurotransmitter release at both synapses in the pathway shown in the image?

Accepted Answer

$$	ext{Preganglionic neuron} \xrightarrow{ACh} 	ext{Postganglionic neuron} \xrightarrow{ACh} 	ext{Effector}$$

Question 12

Which of the following best describes the effect of acetylcholine on muscarinic receptors in the lungs?

Accepted Answer

Constricts airways

Question 13

If a patient is given a drug that blocks acetylcholine release at the postganglionic synapse shown in the image, which physiological response would most likely be impaired?

Accepted Answer

Rest and digest activities

Question 14

Which of the following is a characteristic of the pathway shown in the image that distinguishes it from the sympathetic division?

Accepted Answer

Preganglionic fibers are long

Question 15

Which of the following best describes the effect of binding to nicotinic receptors on the postganglionic neuron in the pathway shown?

Accepted Answer

Always excitatory

Study Guidance for Chapter 14: The Autonomic Nervous System (ANP College Level)

Study Guide - Practice Questions

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