Question 1

Which of the following best describes the difference between the dorsal and ventral roots of the spinal cord?

Accepted Answer

Dorsal roots carry sensory information toward the spinal cord, while ventral roots carry motor information away from the spinal cord.

Question 2

A patient suffers damage to the anterior gray horn of the spinal cord. Which function is most likely to be impaired?

Accepted Answer

Motor control of skeletal muscles

Question 3

Which equation correctly represents the basic naming scheme of spinal nerves?

Accepted Answer

$$\mathrm{Spinal\ Nerve} = \mathrm{Vertebra\ Level} + \mathrm{Number}$$

Question 4

Which tract is responsible for voluntary motor control and is represented by the following pathway?

Accepted Answer

$$\mathrm{Cortex} \rightarrow \mathrm{Spinal\ Cord} \rightarrow \mathrm{Skeletal\ Muscle}$$

Question 5

Which of the following is a function of the basal ganglia in voluntary movement?

Accepted Answer

Initiating and planning complex motor movements

Question 6

A patient presents with loss of fine touch sensation in the lower limbs. Which pathway is most likely affected?

Accepted Answer

Dorsal column-medial lemniscus pathway

Question 7

Which cranial nerve is responsible for both sensory and motor functions in the face?

Accepted Answer

Trigeminal nerve (V)

Question 8

Which neurotransmitter is primarily released by preganglionic neurons in both the sympathetic and parasympathetic nervous systems?

Accepted Answer

Acetylcholine

Question 9

Which of the following best describes the difference in axon length between the sympathetic and parasympathetic divisions?

Accepted Answer

Parasympathetic preganglionic axons are longer than sympathetic preganglionic axons.

Question 10

A patient is unable to move their right arm after a stroke affecting the left primary motor cortex. Which principle does this scenario illustrate?

Accepted Answer

Contralateral control of voluntary movement

Question 11

Which equation best represents the relationship between sensory input and motor output in a simple reflex arc?

Accepted Answer

$$\mathrm{Sensory\ Neuron} \rightarrow \mathrm{Interneuron} \rightarrow \mathrm{Motor\ Neuron}$$

Question 12

Which of the following is a characteristic of the autonomic nervous system?

Accepted Answer

It regulates involuntary functions such as heart rate and digestion.

Question 13

Which neurotransmitter is released by most sympathetic postganglionic neurons?

Accepted Answer

Norepinephrine

Question 14

Damage to the spinothalamic tract would most likely result in loss of which sensation?

Accepted Answer

Pain and temperature

Question 15

Which of the following best describes the function of the cerebellum in voluntary movement?

Accepted Answer

Coordinates and refines motor activity

Question 16

Which cranial nerve is responsible for transmitting visual information from the retina to the brain?

Accepted Answer

Optic nerve (II)

Question 17

A patient with damage to the dorsal root of a spinal nerve would most likely experience which symptom?

Accepted Answer

Loss of sensory perception in the affected area

Question 18

Which pathway is responsible for transmitting information about pain and temperature to the brain?

Accepted Answer

Spinothalamic tract

Question 19

Which of the following is a feature of the parasympathetic nervous system?

Accepted Answer

Long preganglionic axons and short postganglionic axons

Question 20

Which equation best represents the neurotransmitter release in the sympathetic division?

Accepted Answer

$$\mathrm{Preganglionic\ Neuron}: \mathrm{ACh} \rightarrow \mathrm{Postganglionic\ Neuron}: \mathrm{NE}$$

Study Guide: Nervous System – Spinal Cord, PNS, Reflexes, and Autonomic Nervous System

Study Guide - Practice Questions