Schwann Cells

Question 1

Schwann cells are myelin producing cells of the _____________ nervous system.

Answer 1

PERIPHERAL

PNS

Question 2

The complete Schwann cell, including the cell body (soma), wraps around about two millimeters of what?

Answer 2

AN AXON

Question 3

What is the name of the gap along the axon between the ends of Schwann cells?

Answer 3

NODE OF RANVIER

Question 4

What is the main purpose of a myelin layer, aka myelin sheath?

Answer 4

INCREASE SPEED AT WHICH IMPULSES PROPAGATE ALONG AXON

Question 5

What does myelin prevent?

Answer 5

NERVE SIGNAL LEAKAGE INTO SURROUNDING INTERSTITIAL FLUID

Question 6

Schwann cells are able to phagocytose (munch) damaged myelin and lay down new myelin approximately ________ after a nerve fiber loses its myelin sheath.

Answer 6

1 WEEK

Question 7

Axon is ________ fiber.

Answer 7

NERVE

Question 8

Name the part of a nerve cell which carries signals to the cell body?

Answer 8

DENDRITE

Question 9

Name the part of a nerve cell which carries signals to the effectors (muscles/glands)?

Answer 9

AXON TERMINAL

Question 10

What is another name for a Schwann cell body?

Answer 10

SOMA