A) Aerobic system

B) Phosphagen system

C) Glycogen-lactic acid system

D) Phosphocreatine system

E) Stored ATP

A) Increased testosterone secreted in the male

B) Increased estrogen secreted by the female

C) Higher exercise levels in the male

D) Greater glycogen deposition by males

A) Maximum weight it can lift

B) Force required to stretch it after it has contracted

C) Work that the muscle can perform per unit of time

D) How long a muscle can lift a given amount of weight

A) Fast-twitch fibers are less dependent on the phosphagen and glycogen-lactic acid systems

B) Slow-twitch fibers have more mitochondria surrounding them

C) Slow-twitch fibers have less myoglobin

D) Number of capillaries surrounding slow-twitch fibers is less

E) Fast-twitch fibers are smaller in diameter

A) Stroke volume in the Olympic athletes is about 5% greater at rest

B) Percentage increase in heart rate during maximal exercise is much greater in the Olympic athletes

C) Maximum cardiac output is only 3% to 4% greater in the Olympic athletes

D) Resting heart rate in the Olympic athletes is significantly higher

A) Maximum oxygen consumption of a male marathon runner is less than that of an untrained average male

B) Maximum oxygen consumption can be increased about 100% by training