GENERAL HISTOLOGY

Detailed explanation-1: -The sodium-potassium pump system moves sodium and potassium ions against large concentration gradients. It moves two potassium ions into the cell where potassium levels are high, and pumps three sodium ions out of the cell and into the extracellular fluid.

Detailed explanation-2: -The sodium-potassium pump hydrolyzes ATP to move sodium (Na+) and potassium (K+) ions into or out of a cell. Each cycle of the pump indeed moves 3 Na+ and 2 K+. However, Na+ are moved out of the cell, not into it. Additionally, K+ are moved into the cell, not out of it.

Detailed explanation-3: -The concentration of Na+ ions is more inside the cell, while that of K+ ions is more outside the cells. The pump works by moving 3 Na+ ions outside the cell and moving 2 K+ ions inside the cell. Both of these ions move against the concentration gradient. Thus the given statement is false.

Detailed explanation-4: -also known as the Na+/K+ pump or Na+/K+-ATPase, this is a protein pump found in the cell membrane of neurons (and other animal cells). It acts to transport sodium and potassium ions across the cell membrane in a ratio of 3 sodium ions out for every 2 potassium ions brought in.