The sodium-potassium pump can transport the sodium-potassium pump can transport only if sodium and potassium are available sodium even if potassium is not available potassium even if sodium is not available sodium even if potassium is not available and potassium even if sodium is not available

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.