Question 1

Which of the following correctly describes the beginning and end points of the spinal cord in an adult human?

Accepted Answer

It begins at the medulla oblongata and ends around the level of L1-L2.

Question 2

The protective layers surrounding the spinal cord are collectively called the meninges. Which of the following lists the meninges in order from outermost to innermost?

Accepted Answer

Dura mater, arachnoid mater, pia mater

Question 3

Which space is filled with cerebrospinal fluid (CSF) in the spinal cord?

Accepted Answer

Subarachnoid space

Question 4

The filum terminale is a structure that:

Accepted Answer

Anchors the spinal cord to the coccyx

Question 5

Which ligament is responsible for stabilizing the spinal cord within the vertebral canal?

Accepted Answer

Denticular (denticulate) ligament

Question 6

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

Accepted Answer

It contains neuron cell bodies and is involved in processing and integration of information.

Question 7

White matter in the spinal cord consists mainly of:

Accepted Answer

Myelinated and unmyelinated axons

Question 8

Ascending tracts in the spinal cord carry:

Accepted Answer

Sensory information to the brain

Question 9

Which of the following is NOT a correct match between receptor type and stimulus?

Accepted Answer

Chemoreceptors — detect pressure

Question 10

Exteroceptors detect stimuli from the ______ environment, while interoceptors detect stimuli from ______ organs.

Accepted Answer

external; internal

Question 11

Proprioceptors provide the brain with information about:

Accepted Answer

Body position and movement

Question 12

Which of the following correctly lists the three levels of sensory processing?

Accepted Answer

Receptor level, circuit level, perceptual level

Question 13

How many pairs of spinal nerves are found in the thoracic region?

Accepted Answer

12

Question 14

The phrenic nerve (C3–C5) controls the ______, which is essential for ______.

Accepted Answer

diaphragm; breathing

Question 15

Which plexus is primarily responsible for innervating the upper limb?

Accepted Answer

Brachial plexus

Question 16

The sciatic nerve is composed of two branches. Which are they?

Accepted Answer

Tibial and common fibular nerves

Question 17

A dermatome is best defined as:

Accepted Answer

An area of skin innervated by the sensory fibers of a single spinal nerve

Question 18

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 19

Which of the following is an example of a stretch reflex and its purpose?

Accepted Answer

The patellar reflex, which helps maintain posture and balance

Question 20

If a patient has damage to the dorsal root of a spinal nerve, which function is most likely to be impaired?

Accepted Answer

Sensory input from the body to the spinal cord

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

Study Guide - Practice Questions

Study Guide - Flashcards