W4 practice (39, 43)

Question 1

What does the the epineurium of peripheral nerve consist of?

Answer 1

a loose C.T sheath containing collagen fibers and fibrocytes, covering the peripheral nerve from outside.

Question 2

each fascicle of peripheral nerve is invested by ___

Answer 2

the C.T of the perineurium (2).

Question 3

The innermost C.T layer of peripheral nerve is called ___

Answer 3

endoneurium

Question 4

Cross section of peripheral nerve
-> identify

Answer 4

1)epineurium.
2)perineurium.
3)endoneurium (neurilemma).

Question 5

Cross section of peripheral nerve (HE)
-> identify

Answer 5

1)epineurium.
2)perineurium.
3)endoneurium (neurilemma).
9)bundle of nerve fibers (fascicles).
A)adipose tissue.

Question 6

Cross section of peripheral nerve (HE)
-> identify

Answer 6

1)epineurium.
2)perineurium.
3)endoneurium (neurilemma).

Question 7

Cross section of peripheral nerve (HE)
-> identify

Answer 7

3)endoneurium (neurilemma).
4)axon.
5)myelin sheath.
6)nucleus of Schwann cell.
7)nerve fiber.
8)nucleus of fibrocyte.

Question 8

Longitudinal section of peripheral nerve (HE)
-> identify

Answer 8

2)perineurium.
A)adipose tissue.

Question 9

Longitudinal section of peripheral nerve (HE)
-> identify

Answer 9

4)axon.
5)myelin sheath.
6)nucleus of Schwann cell.
7)nerve fiber.
8)nucleus of fibrocyte.

Question 10

What is the neuromuscular junction?

Answer 10

a modified synapse between the motor axon and the muscle fiber.

Question 11

The role of AcetylCholine esterase

Answer 11

(the hydrolytic enzyme responsible for the fast deactivation of acetylcholine)

Question 12

43) Motor end plate (AchE)-Acetylcholinesterase.
-> Identify

Answer 12

1)skeletal muscle fiber.
2)motor end plate.
3)nucleus of skeletal muscle fiber.