Question 1

Which of the following best describes the function of the white matter in the spinal cord?

Accepted Answer

It carries information from place to place via myelinated and unmyelinated axons.

Question 2

A patient presents with a loss of sensation in a specific region of skin. Which anatomical structure is most likely affected?

Accepted Answer

A dermatome

Question 3

Which meningeal layer is directly attached to the surface of the spinal cord and contains blood vessels supplying the cord?

Accepted Answer

Pia mater

Question 4

Which of the following is TRUE regarding the organization of gray matter in the spinal cord?

Accepted Answer

Anterior horns contain somatic motor nuclei.

Question 5

A person steps on a sharp object and immediately lifts their foot while shifting weight to the other leg. Which neural circuit pattern is primarily responsible for this coordinated response?

Accepted Answer

Parallel processing

Question 6

Which of the following best explains why the cervical and lumbosacral enlargements of the spinal cord are wider than other regions?

Accepted Answer

They supply nerves to the limbs and thus have more gray matter for processing motor and sensory information.

Question 7

Which of the following is a characteristic of a monosynaptic reflex?

Accepted Answer

It involves a single synapse between a sensory and a motor neuron.

Question 8

A patient is unable to contract the diaphragm and is experiencing difficulty breathing. Which nerve is most likely damaged?

Accepted Answer

Phrenic nerve

Question 9

Which of the following best describes the function of the Golgi tendon organ in the tendon reflex?

Accepted Answer

It inhibits muscle contraction to prevent tendon damage.

Question 10

Which of the following statements about spinal nerves is correct?

Accepted Answer

They are formed by the union of anterior and posterior roots and are mixed nerves.

Question 11

A patient with carpal tunnel syndrome is most likely to experience sensory changes in the area supplied by which nerve?

Accepted Answer

Median nerve

Question 12

Which of the following best describes the effect of reciprocal inhibition during a withdrawal reflex?

Accepted Answer

Flexor muscles contract while extensor muscles are inhibited.

Question 13

Which of the following is a function of the denticulate ligaments?

Accepted Answer

They anchor the pia mater to the arachnoid and dura mater, preventing lateral movement of the spinal cord.

Question 14

Which of the following best describes the Babinski reflex in adults?

Accepted Answer

It is abnormal and may indicate CNS damage.

Question 15

Which of the following is TRUE regarding the organization of white matter in the spinal cord?

Accepted Answer

Posterior white columns are located between the posterior horns and the posterior median sulcus.

Question 16

Which of the following best explains why a lumbar puncture is performed below the level of the conus medullaris?

Accepted Answer

To avoid damaging the spinal cord, which ends at the conus medullaris.

Question 17

Which of the following is a characteristic of polysynaptic reflexes?

Accepted Answer

They involve pools of interneurons and can activate muscles in multiple areas.

Question 18

Which of the following best describes the function of the phrenic nerve?

Accepted Answer

It controls the diaphragm, essential for breathing.

Question 19

Which of the following is the correct order of events in a reflex arc?

Accepted Answer

Stimulus → Activation of sensory neuron → Information processing in CNS → Activation of motor neuron → Response by effector

Question 20

Which of the following best describes the effect of higher brain centers on spinal reflexes?

Accepted Answer

They can facilitate, inhibit, or fine-tune spinal reflexes through descending pathways.

Study Guide: The Spinal Cord, Spinal Nerves, and Spinal Reflexes (Chapter 13)

Study Guide - Practice Questions

Study Guide - Flashcards