List the 4 things that all cells have. Describe what the function of each item is.

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.

A(n) is a molecule influences the way that a molecule reacts.

Identify the structure in organisms that do not have kidneys that is adapted to regulate water balance