Question 1

Which structure of the spinal cord is responsible for transmitting motor signals from the central nervous system to peripheral effectors?

Accepted Answer

Ventral root

Question 2

A patient suffers a spinal cord injury at the lumbar region. Which of the following is the most likely functional deficit?

Accepted Answer

Loss of lower limb motor and sensory function

Question 3

Which nerve is primarily responsible for controlling the diaphragm and thus plays a critical role in respiration?

Accepted Answer

Phrenic nerve

Question 4

The dorsal horn of the spinal cord is primarily associated with which function?

Accepted Answer

Sensory input

Question 5

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

Accepted Answer

White matter forms the outer layer, gray matter is central

Question 6

A lesion affecting the ventral horn of the spinal cord would most likely result in which clinical presentation?

Accepted Answer

Loss of voluntary motor function

Question 7

Which plexus is responsible for innervating the upper limb?

Accepted Answer

Brachial plexus

Question 8

During a sheep brain dissection, you identify a structure connecting the two cerebral hemispheres. Which structure is this?

Accepted Answer

Corpus callosum

Question 9

Which of the following correctly traces the sensory pathway from a peripheral receptor to the brain?

Accepted Answer

Receptor → dorsal root → dorsal horn → brain

Question 10

If the dorsal root of a spinal nerve is damaged, what is the most likely effect?

Accepted Answer

Loss of sensory function

Question 11

Which structure in the sheep brain is responsible for coordinating voluntary movements and maintaining balance?

Accepted Answer

Cerebellum

Question 12

Which of the following best explains why the cervical and lumbar enlargements are present in the spinal cord?

Accepted Answer

They accommodate increased numbers of neurons serving the limbs

Question 13

A patient presents with loss of sensation but preserved motor function in a limb. Which spinal structure is most likely damaged?

Accepted Answer

Dorsal root

Question 14

Which of the following is the correct order for the motor pathway from the central nervous system to a muscle?

Accepted Answer

CNS → ventral horn → ventral root → muscle

Question 15

Which structure is found in the midsagittal view of the sheep brain and is responsible for relaying sensory information to the cerebral cortex?

Accepted Answer

Thalamus

Question 16

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

Accepted Answer

Transmission of nerve impulses via ascending and descending tracts

Question 17

A patient has difficulty flexing their wrist and fingers after a humeral fracture. Which nerve is most likely affected?

Accepted Answer

Median nerve

Question 18

Which structure separates the two cerebral hemispheres in the sheep brain?

Accepted Answer

Longitudinal fissure

Question 19

Which of the following is a correct sequence for tracing a stimulus to a muscle response?

Accepted Answer

Stimulus → spinal cord → brain → muscle response

Question 20

Which of the following best describes the function of the arbor vitae in the cerebellum?

Accepted Answer

Coordinates and integrates sensory and motor information for balance

Spinal Cord & Sheep Brain Lab Study Guide (ANP)

Study Guide - Practice Questions