Which of the following is the best example of the function of the peripheral nervous system?
a. it connects the central nervous system to the rest of the body.
b. it commands the rest-and-digest and fight-or-flight functions of the body.
c. it connects the central nervous system to the muscles of the body.
d. it commands reflexes, digestion, heartbeat, and other functions of the body.

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.