muscle fibers that produce large amounts of force but are prone to fatigue are classified as _________ fibers

_________ increase(s) metabolic rate and promote(s) protein synthesis.

_________ stimulates the testes to produce testosterone.

Type I diabetes mellitus is caused by _________.

_________ maintain(s) the healthy balance of and in body fluid.

A hormone is a chemical messenger that produces specific responses in_________.

The hormone(s) that regulate(s) wake-sleep cycles is(are) _________ produced by the _________ gland.

Humans have ______ pairs of cranial nerves.

The secretion of estrogens is controlled by _________.

_________ prepare(s) the body to meet short-term stress.