1. Using anabolic steroids when they are not medically necessary can result in (

Question

1. Using anabolic steroids when they are not medically necessary can result in (you may choose more than one answer):

a. heart attack

b. stroke

c. shrinking of testicles, sterility and impotence

d. liver cancer

2. The technical term for a muscle cell is a(n):

a. sarcomere

b. muscle fiber

c. striation

d. none of the above

3. When a muscle is relaxed, the myosin heads are

a. covered by actin

b. completely exposed

c. covered by myosin heads

d. covered by the troponin-tropomyosin complex

4. Forcing muscle to exert more than 75% of their maximal strength will result in the production of more muscle fibers.

True

False

5. Muscle contraction involves the compression of the myosin filament.

True

False

6. The main muscle that is contracting when you do a push-up is the biceps.

True

False

7. The myosin heads are released from the actin molecules only when ATP is available to bind to them. When a person dies, they can no longer producing ATP. If they are no longer producing ATP, then there isn't any ATP available to bind to the myosin head to release it from the actin and relax the muscle. This is why a person is "stiff" when they die; their muscles are in a state of contraction because there aren't any ATPs available to relax them. The technical term for this is rigor mortis.

True

False

8. The sarcomere spans from one Z line to the next Zline.

True

False

Explanation / Answer

1- c. shrinking of testicles, sterility and impotence, d. liver cancer a. heart attack, b. stroke

2- b. muscle fiber,

3- d. covered by the troponin-tropomyosin complex

4- false

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