General

Question 1

What is the CNS?

Answer 1

brain and spinal cord

Question 2

What is the PNS?

Answer 2

spinal nerve that branch of spinal cord that innervate the entire body

Question 3

What does the spinal cord do?

Answer 3

passes info between brain and PNS

acts as major reflex center for body below the head

Question 4

What is the spinal cord continuous with superiorly?

Answer 4

the brainstem through the Foramen magnum of the skull

Question 5

What are the regions that the spinal cord is divided?

Answer 5

5 regions 
Cervical 
thoracic 
lumbar 
sacral 
coccygeal

Question 6

What are the spinal cord roots?

Answer 6

8 cervical 
12 thoracic 
5 lumbar 
5 sacral 
1 coccygeal

Question 7

What carries info from the periphery toward the CNS to ascend the spinal cord to the brain?

Answer 7

Afferent neurons

Question 8

What are the type of Afferent neurons?

Answer 8

first order afferent

second order afferent

Question 9

What are first order afferent neurons?

Answer 9

peripheral sensory neurons whose body cell body lie in the dorsal root ganglia

Question 10

What are second order afferent nerves?

Answer 10

cell bodies located in the gray matter within CNS

Question 11

What are efferent Neurons?

Answer 11

carry info from brain to the periphery

Question 12

What are the type of Efferent neurons?

Answer 12

lower motor neurons

upper motor neurons

Question 13

What are lower motor efferent neurons?

Answer 13

cell bodied located in the ventral horn of gray matter and their axons terminate on effector organs of the periphery

Question 14

What are upper motor efferent neurons?

Answer 14

efferent neurons tat descend the spinal cord to synapse on lower motor neurons