Nervous System III

Question 1

Spinal nerve arrangement

Answer 1

Ventral and dorsal root connect as spinal root to exit the spine, split into dorsal and ventral again

Question 2

What does the dorsal root do?

Answer 2

Sensory

Question 3

What does the ventral root do?

Answer 3

Motor/glands

Question 4

How many pairs of cranial nerves are there?

Answer 4

12

Question 5

Where do spinal sensory nerves synapse?

Answer 5

dorsal root ganglion

Question 6

What are sensory nerves in spinal nerves formed from?

Answer 6

dorsal root only

Question 7

Where do spinal motor nerves synapse?

Answer 7

spinal cord

Question 8

What are motor nerves formed from?

Answer 8

ventral root

Question 9

What are the four plexuses formed by anterior rami?

Answer 9

cervical, brachial, lumbar, sacral

Question 10

Parasympathetic?

Answer 10

rest and digest

Question 11

Sympathetic?

Answer 11

fight or flight

Question 12

What is thoracolumbar outflow?

Answer 12

the neurons begin at the thoracic and lumbar (T1–L2) portions of the spinal cord

Question 13

What is the sympathetic trunk made up of?

Answer 13

Gray and white rami
Rami communicantes
Sympathetic chain ganglia

Question 14

Gray rami

Answer 14

carry postsynaptic sympathetic fibers from the sympathetic trunk to all spinal nerves.

Question 15

Rami communicantes

Answer 15

a nerve which connects two other nerves, and can be translated as “communicating branch”.

Question 16

What is craniosacral outflow?

Answer 16

the neurons begin at the cranial nerves (CN3, CN7, CN9, CN10) and sacral (S2–S4) spinal cord.

Question 17

White rami

Answer 17

carry presynaptic sympathetic fibers from the ventral primary rami to the sympathetic trunk and exist only between spinal cord segments T1 and L2