Excitability of the muscle cell is:
1. Excitability of the muscle cell is:
a. the ability of the muscle to contract.
b. the muscle cell will recoil to its resting length when the applied tension is removed.
*c. to respond to electrical stimuli
d. muscle cell is capable of extending in length in response to contraction of opposing muscle cell.

2. Skeletal muscle cells are often referred to as muscle fibers because:
a. they are very strong
b. they are made of collagen
c. they are cord-like
*d. they are very long

3. The Perimysium
*a. surrounds bundles of muscle fibers
b. is the innermost connective tissue layer that surrounds each individual cell
c. is a layer of dense irregular connective tissue that surrounds whole skeletal muscle.
d. none of the above

4. From the clinical view, tendonitis:
a. is a disease of the tendon
b. must be treated with surgery
*c. symptoms can be relieved with anti-inflammatory drugs, icing
d. symptoms will go away with regular use

5. In a skeletal muscle fiber, a trad is composed of?
a. myosin, actin, and myofibers
b. one A band, one h zone, and one I band
*c. one transverse tubule and two terminal cisternae
d. myofilements, myofibils, and sarcomeres

6. 6. During the contraction of a muscle fiber, myofibrils
a. lengthen
b. remain unchanged
*c. increase in diameter
d. shorten

a.
b.
c.
d.

7.
a.
b.
c.
d.

8.
a.
b.
c.
d.

9.
a.
b.
c.
d.

10.
a.
b.
c.
d.

Answers: 1, C 2, D 3, A 4, C