The depolarization phase of an action potential requires . The depolarization phase of an action potential requires . opening of K channels in the membrane a Ca2 concentration gradient across the membrane a K concentration gradient across the membrane opening of Ca2 channels in the membrane opening of Na channels in the membrane

Opening of Na channels in the membrane

Explanation:

Depolarization is the mechanism of opening or closing channels in the membrane. The depolarization of action potential requires opening of Na channels in the membrane to increase the membrane potential through the increased influx of Na ion

a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.