Describe the differences that exist between the sodium-potassium pumps and the voltage-gated sodium and voltage-gated potassium channels. include information on *when' each is active, "when' each is inactive and how each effects sodium ions and potassium ions.

Abird flies by moving its wings up and down. which two systems are most directly responsible for the movement of a bird's wings? a. skeletal and muscular systems b. respiratory and muscular systems c. skeletal and digestive systems d. respiratory and digestive systems