Question

1. Using anabolic steroids when they are not medically necessarycan 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 maximalstrength will result in the production of more muscle fibers.

True

False

5. Muscle contraction involves the compression of the myosinfilament.

True

False

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

True

False

7. The myosin heads are released from the actin molecules onlywhen ATP is available to bind to them. When a person dies, they canno longer producing ATP. If they are no longer producing ATP, thenthere isn't any ATP available to bind to the myosin head to releaseit from the actin and relax the muscle. This is why a person is"stiff" when they die; their muscles are in a state of contractionbecause there aren't any ATPs available to relax them. Thetechnical term for this is rigor mortis.

True

False

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

True

False