2.2 The Spinal Cord Part 2

Question 1

What do the ascending tracts of the spinal cord carry?

Answer 1

carry sensory inputs to the brain

Question 2

What do the descending tracts of the spinal cord carry?

Answer 2

motor outputs down the spinal cord

Question 3

What does the dorsal root of the spinal nerve carry?

Answer 3

incoming afferent neurons

Question 4

What does the dorsal root ganglion carry?

Answer 4

cell bodies of incoming afferent neurons

Question 5

What does the ventral root contain?

Answer 5

axons of motor neurons

Question 6

What does a spinal nerve consist of?

Answer 6

dorssal and ventral roots

Question 7

What is the gray matter of the spinal cord composed of?

Answer 7

mixture of cell bodies of neurons organized into regions called horns

Question 8

How many horns are in the gray matter of the spinal cord?

Answer 8

two posterior/dorsal horns
two anterior/ventral horns

Question 9

What connects the anterior horns of the gray matter?

Answer 9

gray commissure

Question 10

What do the anterior/ventral horns contain?

Answer 10

somatic motor neurons whose axons serve as efferent pathways to skeletalmuscles by way of ventral roots of the spinal cord

Question 11

What do the posterior/dorsal horns contain?

Answer 11

sensory neurons that serve as afferent pathways from receptors by way of dorsal roots of the spinal cord

Question 12

Where are the two lateral horns of the gray matter located?

Answer 12

primarily at the thoracic level of the spinal cord

Question 13

What do the lateral horns of the gray matter contain?

Answer 13

autonomic sympatetic motor neurons who axons serves as efferent pathways to visceral organs

Question 14

Where do the efferent pathways of lateral horns exit the spinal cord?

Answer 14

ventral roots