Question 1

Which of the following best describes the function of the spinal cord in the central nervous system?

Accepted Answer

It carries sensory and motor information between the brain and most other parts of the body.

Question 2

A patient presents with a loss of sensation and motor function in a specific region of skin after a traumatic injury. Which anatomical concept best explains this localized loss?

Accepted Answer

The injury affected a specific dermatome supplied by a single pair of spinal nerves.

Question 3

Which of the following statements about spinal reflexes is correct?

Accepted Answer

Spinal reflexes are controlled by the spinal cord alone and do not require brain input.

Question 4

During a lumbar puncture (spinal tap), cerebrospinal fluid is withdrawn from which space?

Accepted Answer

Subarachnoid space

Question 5

Which nerve of the cervical plexus is primarily responsible for innervating the diaphragm?

Accepted Answer

Phrenic nerve

Question 6

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

Accepted Answer

Median nerve

Question 7

Which of the following best describes the organization of gray matter in the spinal cord?

Accepted Answer

It is deep and contains cell bodies of neurons, neuroglia, and unmyelinated axons.

Question 8

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

Accepted Answer

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

Question 9

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

Accepted Answer

It detects excessive tension in tendons and stimulates inhibitory interneurons to prevent muscle damage.

Question 10

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

Accepted Answer

Crossed extensor reflex

Question 11

Which of the following is true regarding the white matter of the spinal cord?

Accepted Answer

It is organized into columns that contain tracts carrying information up and down the spinal cord.

Question 12

Which of the following best describes the 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 13

Which of the following is a correct statement about the Babinski reflex?

Accepted Answer

It is normal in infants and results in fanning of the toes.

Question 14

Which of the following best describes the role of interneurons in polysynaptic reflexes?

Accepted Answer

They allow for complex responses by integrating and coordinating signals from multiple sources.

Question 15

A patient is unable to flex their forearm and has lost sensation on the lateral side of the forearm. Which nerve is most likely damaged?

Accepted Answer

Musculocutaneous nerve

Question 16

Which of the following best describes the function of the anterior root of a spinal nerve?

Accepted Answer

It contains axons of motor neurons.

Question 17

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

Accepted Answer

Braking a car during an emergency after years of driving experience

Question 18

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

Accepted Answer

They contain more gray matter to supply nerves to the limbs.

Question 19

Which of the following is a correct description of the organization of a nerve plexus?

Accepted Answer

It is a complex, interwoven network of nerve fibers formed from the anterior rami of adjacent spinal nerves.

Question 20

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

Accepted Answer

The flexor muscles contract while the antagonistic extensor muscles are inhibited.

Study Guide: The Spinal Cord, Spinal Nerves, and Spinal Reflexes

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