Question

In order to maintain homeostasis, human cells must have a higher concentration of sodium ions outside the cell than inside the cell. In addition, the concentration of potassium ions must be higher inside the cell than outside the cell. Which of the following forms of cellular transportation helps human cells maintain a relatively constant sodium and potassium concentration?
A. osmosis B. endocytosis C. diffusion D. a cell membrane pump

Answer 1

Cell Membrane pump works to regulate the Sodium and Potassium. The channel will open and allow Sodium in while releasing Potassium.

Answer 2

Answer:

D. a cell membrane pump

Explanation:

What helps human cells maintain a relatively constant concentration of sodium and potassium is cell membrane pumps called sodium and potassium pumps.

Sodium potassium pump is a plasma membrane protein that uses energy ATP - Triphosphate Adenosine transforming into ADP - Adenosine Diphosphate to bring sodium (NA +) and potassium (K +) ions into the intracellular and extracellular environment consecutively. This whole process aims to maintain the balance of cells.

Extracellular medium has higher sodium concentration while intracellular medium has higher potassium concentration. To maintain cell equilibrium with maintaining concentrations, proteins capture sodium ions in the cytoplasm and pump them out of cells. Outside the cells proteins capture potassium ions by pumping into the cell.

With the responsibility for active and consecutive transport of sodium and potassium ions, the sodium and potassium pump is linked to some processes in the human body such as muscle contraction and nerve impulses, also facilitating amino acids and sugar. absorbed.

This equilibrium in potassium concentration in the intracellular medium is essential for protein synthesis beyond respiration and pumping sodium into the extracellular medium, allowing osmotic balance as well. It also maintains the concentration of water in the intracellular medium and the stability of cell volume.