Question 1

Which of the following best describes the function of the dorsal horns in the spinal cord?

Accepted Answer

They contain interneurons that receive sensory information from the body.

Question 2

The spinal cord begins at the __________ and ends around the level of __________.

Accepted Answer

medulla oblongata; L1-L2 vertebrae

Question 3

Which of the following is NOT a function of the meninges surrounding the spinal cord?

Accepted Answer

Transmitting sensory signals to the brain

Question 4

Which equation correctly represents the number of spinal nerve pairs in the cervical, thoracic, and lumbar regions combined?

Accepted Answer

$$8 + 12 + 5 = 25$$

Question 5

A patient presents with loss of sensation in the skin overlying the lateral forearm. Which structure is most likely affected?

Accepted Answer

The dermatome supplied by the C6 spinal nerve

Question 6

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

Accepted Answer

It controls the diaphragm, which is essential for breathing.

Question 7

Which of the following is TRUE regarding ascending and descending tracts in the spinal cord?

Accepted Answer

Ascending tracts carry sensory information to the brain, while descending tracts carry motor signals away from the brain.

Question 8

Which of the following sensory receptors is correctly matched to its stimulus?

Accepted Answer

Thermoreceptors — temperature

Question 9

Which statement about the stretch reflex is most accurate?

Accepted Answer

It helps maintain muscle tone and posture by causing muscle contraction in response to stretching.

Question 10

Which of the following correctly lists the five components of a reflex arc in order?

Accepted Answer

Receptor, sensory neuron, integration center, motor neuron, effector

Question 11

Which equation best represents the total number of spinal nerve pairs in the human body?

Accepted Answer

$$8 + 12 + 5 + 5 + 1 = 31$$

Question 12

Which of the following best describes the function of the denticulate ligaments?

Accepted Answer

They anchor the spinal cord laterally to the dura mater.

Question 13

Which of the following statements about white matter in the spinal cord is correct?

Accepted Answer

It consists mainly of myelinated and unmyelinated axons organized into tracts.

Question 14

Which plexus is primarily responsible for innervating the lower limb?

Accepted Answer

Sacral plexus

Question 15

Which of the following best describes the difference between exteroceptors and interoceptors?

Accepted Answer

Exteroceptors detect stimuli from the external environment, while interoceptors detect stimuli from internal organs.

Question 16

Which of the following is a correct statement about the organization of gray matter in the spinal cord?

Accepted Answer

It resembles the shape of the letter H.

Question 17

Which of the following is TRUE regarding the cauda equina?

Accepted Answer

It is a bundle of nerve roots at the lower end of the spinal cord.

Question 18

Which of the following best describes the function of proprioceptors?

Accepted Answer

They provide the brain with information about body position and movement.

Question 19

Which of the following is a correct sequence for the three levels of sensory processing?

Accepted Answer

Receptor level, circuit level, perceptual level

Question 20

Which of the following statements about plastic and phasic receptors is correct?

Accepted Answer

Phasic receptors adapt quickly, while tonic receptors adapt slowly.

Study Guide: The Spinal Cord, Sensory Receptors, and Reflexes

Study Guide - Practice Questions