The rate of metabolism is regulated by which hormone?

a. pth
b. aldosterone
c. thyroxin
d. calcitonin

The response is the basis for vaccination. primary secondary tertiary none of the above

What sentence best supports the statement that hormones are involved in the regulation of homeostasis? a. the hormone erythropoeitin increases the production of red blood cells when oxygen levels are low. b. the hormone oxytocin promotes labor contractions of the uterus during childbirth. c. the hormone melatonin induces sleep and its production is slowed by exposure to light. d. the hormone cortisol suppresses the immune system and is produced when the body is under stress.

Categorize each term as something that is typical of a scientific theory, a scientific hypothesis, or both. makes predictions