Deck 24: Spinal Cord, Spinal Nerves, and Reflexes

Question 1

The ________ carry somatic motor neurons out of the cord and to skeletal muscles.

A) anterior gray horns
B) lateral gray horns
C) posterior gray horns

Answer 1

A

Question 2

Which type of reflex has pathways in the cranial nerves?

A) spinal reflexes
B) somatic reflexes
C) cranial reflexes
D) visceral reflexes

Answer 2

C

Question 3

The ________ consists of motor neurons exiting the CNS and leading to effectors.

A) dorsal root
B) dorsal root ganglia
C) filum terminale
D) ventral root

Answer 3

D

Question 4

Which branch of the peripheral nerves supplies the skin and muscles of the back?

A) dorsal ramus
B) ventral ramus
C) gray ramus
D) white ramus

Question 5

The patellar "knee jerk" reflex is an example of a(n) ________.

A) stretch reflex
B) stress reflex
C) extensor thrust reflex
D) crossed-extensor reflex

Question 6

Where would a needle be inserted in order to perform a spinal tap?

A) dura mater
B) subdural space
C) subarachnoid space
D) epidural space

Question 7

There are ________ segments of the spinal cord.

A) 30
B) 12
C) 31
D) 24

Question 8

A major nerve of the lumbar plexus is ________.

A) femoral
B) axillary
C) phrenic
D) sciatic

Question 9

Which of the following nerves does NOT arise from the brachial plexus?

A) median
B) phrenic
C) radial
D) ulnar

Question 10

All of the following are spinal plexuses EXCEPT ________.

A) lumbar plexus
B) brachial
C) thoracic plexus
D) cervical plexus

Question 11

What is the space within the meninges of the spinal cord that contains the cerebrospinal fluid?

A) pia mater
B) subarachnoid space
C) subdural space
D) epidural space

Question 12

Which nerve innervates the flexor muscles of the forearm and digits, the pronator muscles, and the lateral skin of the hand?

A) median
B) radial
C) axillary
D) ulnar

Question 13

There are ________ cervical nerves.

A) five
B) 10
C) seven
D) eight

Question 14

What is the fibrous connective tissue layer that attaches to the bony walls of the spinal cord?

A) dura mater
B) pia mater
C) arachnoid mater
D) epidural space

Question 15

Which part of the reflex arc is activated by a stimulus?

A) efferent neuron
B) afferent neuron
C) receptor
D) integrating center

Question 16

What is the opening in the gray matter that contains cerebrospinal fluid?

A) gray horns
B) gray commissure
C) central canal
D) white columns

Question 17

Which of the following is the proper order of the five steps involved in the reflex arc?

A) effector, efferent neuron, integration center, afferent neuron, receptor
B) effector, afferent neuron, integration center, efferent neuron, receptor
C) receptor, afferent neuron, integration, efferent neuron, effector
D) receptor, efferent neuron, integration center, afferent neuron, effector

Question 18

Cell bodies of the sensory neurons of the spinal nerves are located in ________.

A) the dorsal root ganglia of the spinal cord
B) the thalamus
C) sympathetic ganglia
D) the ventral root ganglia of the spinal cord

Question 19

Which of the following nerves contain ANS neurons?

A) thoracic nerves
B) coccygeal nerves
C) cervical nerves
D) all lumbar nerves

Question 20

The ________ extends past the conus medullaris to anchor the spinal cord in the sacrum.

A) lumbar enlargement
B) cervical enlargement
C) filum terminale
D) cauda equina