Which of these is true of a cell membrane? A: A cell membrane has a property called selective judgment. B: A cell membrane blocks all particles from coming through. C: A cell membrane is a protective structure that encloses a cell. D: all of the above

Internal feedback works to maintain homeostasis when your a. heart rate decreases as your white blood cells increase b. breathing rate decreases as your red blood cells decrease c. heart rate increases as your liver is cleaning blood d. breathing rate increases as your heart rate increases