Question 1

Which of the following best describes the function of the cauda equina in the spinal cord?

Accepted Answer

It is a bundle of nerve roots extending below the conus medullaris, resembling a horse’s tail.

Question 2

A patient presents with a loss of sensation in a specific, band-like region of skin on the torso. Which anatomical concept best explains this pattern?

Accepted Answer

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

The posterior horns contain somatic and visceral sensory nuclei.

Question 5

A patient is unable to contract the diaphragm and is experiencing respiratory distress. Damage to which nerve plexus is most likely responsible?

Accepted Answer

Cervical plexus

Question 6

Which of the following best describes a monosynaptic reflex?

Accepted Answer

It involves a single synapse between a sensory and a motor neuron, resulting in a rapid response.

Question 7

Which of the following neural circuit patterns allows a single sensory input to produce multiple motor outputs, such as the simultaneous contraction of several muscles?

Accepted Answer

Divergence

Question 8

Which of the following is a characteristic of polysynaptic reflexes?

Accepted Answer

They can activate multiple muscle groups and involve pools of interneurons.

Question 9

A person steps on a sharp object with the right foot. Which reflex ensures that the left leg extends to support body weight before the right leg is lifted?

Accepted Answer

Crossed extensor reflex

Question 10

Which of the following best explains why the Babinski reflex is considered abnormal in adults but normal in infants?

Accepted Answer

Descending inhibition from the brain matures after infancy, suppressing the Babinski response.

Question 11

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 12

Which structure contains the cell bodies of sensory neurons entering the spinal cord?

Accepted Answer

Dorsal root ganglion

Question 13

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

Accepted Answer

It controls the diaphragm and is essential for breathing.

Question 14

Which of the following is a function of the white matter in the spinal cord?

Accepted Answer

It transmits sensory and motor information via ascending and descending tracts.

Question 15

A patient with carpal tunnel syndrome is most likely to experience symptoms due to compression of which nerve?

Accepted Answer

Median nerve

Question 16

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

Accepted Answer

It detects excessive tension in tendons and triggers muscle inhibition to prevent damage.

Question 17

Which of the following is a correct sequence for the components of a reflex arc?

Accepted Answer

Receptor → Sensory neuron → CNS (integration center) → Motor neuron → Effector

Question 18

Which of the following best explains why a spinal tap (lumbar puncture) is typically performed between L3 and L4 vertebrae?

Accepted Answer

The spinal cord ends at L1–L2, reducing the risk of damaging it.

Question 19

Which of the following is a real-life example of an acquired reflex?

Accepted Answer

Braking a car in an emergency situation

Question 20

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

Accepted Answer

Flexor muscles contract while extensor muscles are inhibited.

The Spinal Cord, Spinal Nerves, and Spinal Reflexes: Structured Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards