A&P Lab Exercise 15

Question 1

What system is the spinal cord a part of?

Answer 1

CNS

Question 2

What system are the spinal nerves a part of?

Answer 2

PNS

Question 3

Where do sensory impulses travel?

Answer 3

Up the spinal cord to high centers

Question 4

Where do motor impulses travel?

Answer 4

From the brain down the spinal cord to effectors

Question 5

What three things does the spinal cord play a role in?

Answer 5

Communication, association center, reflex activity

Question 6

Where does the spinal cord sit?

Answer 6

Central canal

Question 7

Where does the spinal cord span to and from?

Answer 7

The foramen magnum to L1 or L2

Question 8

What is the end of the spinal cord called?

Answer 8

Conus medullaris

Question 9

What are the three covering of the spinal cord?

Answer 9

Dura mater
Arachnoid mater
Pia mater

Question 10

What is the filum terminale?

Answer 10

The fibrous extension of the pia mater that anchors the spinal cord to the coccyx

Question 11

What is the cauda equina?

Answer 11

The collection of spinal nerves arising forom the lower end of the spinal cord

Question 12

Which rami make up plexuses?

Answer 12

Ventral rami

Question 13

How many cervical nerves are there?

Answer 13

8 pairs

Question 14

How many thoracic nerves are there?

Answer 14

12 pairs

Question 15

How many lumbar nerves are there?

Answer 15

5 pairs

Question 16

How many sacral nerves are there?

Answer 16

5 pairs

Question 17

How many coccygeal nerves are there?

Answer 17

1 tiny one

Question 18

Where do the spinal nerves exit in relation to the vertebrae?

Answer 18

From C1-C7 they exit from above the vertebrae; from C8 and down they exit from below the vertebrae

Question 19

Where are the spinal enlargements?

Answer 19

Cervical and lumbar

Question 20

What are the four plexuses?

Answer 20

Cervical, brachial, lumbar, sacral

Question 21

Where does the cervical plexus originate?

Answer 21

C1-C5

Question 22

What is the famous cervical plexus nerve and what does it innervate?

Answer 22

Phrenic nerve innervates the diaphragm

Question 23

Where does the brachial plexus originate?

Answer 23

C5-T1

Question 24

What are the five brachial plexus nerves?

Answer 24

Axillary
Musculocutaneous
Radial
Median
Ulnar

Question 25

Where does the lumbar plexus originate?

Answer 25

L1-L5

Question 26

What is the famous lumbar plexus nerve?

Answer 26

Femoral

Question 27

Where does the sacral plexus originate?

Answer 27

L4-5, S1-3

Question 28

What is the largest nerve of the body, and what plexus is it from?

Answer 28

Sciatic from the sacral plexus