MEDICAL PHYSIOLOGY

Detailed explanation-1: -As K+ starts to leave the cell (Facilitated Diffusion), taking a positive charge with it, the membrane potential begins to move back toward its resting voltage. This is called repolarization, meaning that the membrane voltage moves back toward the-70 mV value of the resting membrane potential.

Detailed explanation-2: -Facilitated Diffusion: Example Potassium channels are integral proteins and allow only potassium ions through because: Other positively charged ions are too large to move through the channel. Other ions are too small to form bonds with the amino acids located in the channel so they remain attached to water molecules.

Detailed explanation-3: -The sodium-potassium pump carries out a form of active transport-that is, its pumping of ions against their gradients requires the addition of energy from an outside source.

Detailed explanation-4: -Facilitated diffusion therefore allows polar and charged molecules, such as carbohydrates, amino acids, nucleosides, and ions, to cross the plasma membrane.