Anatomy Exam 4

Question 1

What are the main functions of the spinal cord?

Answer 1

Conduction—nerve fibers conduct sensory and motor information up and down the spinal cord

Neural integration—spinal neurons receive input from multiple sources, integrate it, and execute appropriate output (for example, bladder control)

Locomotion—spinal cord contains central pattern generators: groups of neurons that coordinate repetitive sequences of contractions for walking

Reflexes—involuntary responses to stimuli that are vital to posture, coordination and protection

Question 2

What are the 4 regions of the spinal cord?

Answer 2

cervical, thoracic, lumbar, and sacral regions

Question 3

What are the meninges of the spinal cord?

Answer 3

dura mater, arachnoid mater, and pia mater

Question 4

Which horn of the spinal cord is for sensory impulse?

Answer 4

dorsal horn

Question 5

Which horn of the spinal cord is for motor impulse?

Answer 5

anterior horn

Question 6

How do you distinguish the ascending tract from the descending tract?

Answer 6

The ascending tracts carry sensory information from the body, like pain, for example, up the spinal cord to the brain. Descending tracts carry motor information, like instructions to move the arm, from the brain down the spinal cord to the body.

Question 7

What are the layers of connective tissue around the nerves?

Answer 7

epineurium, perineurium, and endoneurium.

Question 8

What are all of the plexuses of nerves in our body?

Question 9

What major nerves come out of the cervical plexus?

Question 10

What major nerves come out of the brachial plexus?

Question 11

What are the major nerves that come out of the sacral plexus?

Question 12

What are the major nerves that come out of the lumbar plexus?

Question 13

What are the major nerves that come out of the coccygeal plexus?

Question 14

What are the steps of the reflex arch?

Question 15

Sympathtic vs Parasympathrtic tone
Phisical and Functional differences