Question 1

Which of the following best describes the function of the spinal cord?

Accepted Answer

It acts as a relay center, transmitting both sensory and motor information between the brain and the rest of the body.

Question 2

A patient receives an epidural anesthetic during childbirth. Into which space is the anesthetic injected?

Accepted Answer

Epidural space, located between the bone and dura mater

Question 3

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

Accepted Answer

Dorsal root ganglion

Question 4

A patient presents with loss of sensation in a specific region of skin. Which of the following is most likely damaged?

Accepted Answer

A spinal nerve serving the corresponding dermatome

Question 5

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

Accepted Answer

Gray matter is located centrally and forms an H-shaped region, while white matter surrounds it in columns.

Question 6

Which of the following is a correct sequence of events in a typical spinal reflex arc?

Accepted Answer

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

Question 7

Which meningeal layer is most closely adhered to the surface of the spinal cord and follows its contours?

Accepted Answer

Pia mater

Question 8

A lumbar puncture is performed to collect cerebrospinal fluid (CSF). From which space is the CSF withdrawn?

Accepted Answer

Subarachnoid space

Question 9

Which of the following statements about spinal nerves is correct?

Accepted Answer

They are mixed nerves, containing both sensory and motor fibers.

Question 10

A patient has difficulty breathing due to paralysis of the diaphragm. Which spinal nerve plexus and specific nerve is most likely affected?

Accepted Answer

Cervical plexus, phrenic nerve

Question 11

Which of the following best describes a polysynaptic reflex?

Accepted Answer

It involves at least one interneuron between the sensory and motor neurons, resulting in a slower response.

Question 12

Which of the following tracts would carry sensory information from the body to the brain?

Accepted Answer

Ascending tracts in the white matter

Question 13

A patient is unable to move their right leg but can still feel sensations in it. Which part of the spinal cord is most likely damaged?

Accepted Answer

Anterior (ventral) root

Question 14

Which of the following is a function of the meninges surrounding the spinal cord?

Accepted Answer

They provide physical stability and shock absorption for the spinal cord.

Question 15

Which of the following best explains why damage to a single spinal nerve may not result in complete loss of sensation in its dermatome?

Accepted Answer

There is a degree of overlap between adjacent dermatomes.

Question 16

Which of the following is an example of an acquired reflex?

Accepted Answer

Driving a car

Question 17

Which of the following equations best represents the relationship between the number of spinal cord segments ($$n) $$and the number of pairs of spinal nerves ($$N$$)?

Accepted Answer

$$N = n$$

Question 18

A patient has a spinal cord injury that affects the lateral gray horn. Which function is most likely impaired?

Accepted Answer

Visceral motor control

Question 19

Which of the following best describes the role of the subarachnoid space?

Accepted Answer

It contains cerebrospinal fluid, which absorbs shock and allows diffusion of nutrients and wastes.

Question 20

Which of the following is true regarding the organization of spinal nerve plexuses?

Accepted Answer

They are interwoven networks of nerves formed by the merging of spinal nerve branches.

The Spinal Cord, Spinal Nerves, and Spinal Reflexes – Chapter 13 Study Notes

Guida di studio - Domande di pratica

Study guide - Flashcard