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 human cells maintain a relatively constant sodium and potassium concentration?
a. osmosis b. endocytosis c. diffusion d. a cell membrane pump

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.

i believe the correct answer from the choices listed above is the first option. the scientists need to look at the   validity of data, claims, hypotheses, and observations before  developing an argument. they base their arguments on facts that are present and they make sure they have proofs. 

explanation:

as the gila monster consumes the eggs or young of the desert cottontail and gambel's quail, thus its main food supply is only accessible for a restricted time duration every year. however, for this, the gila monsters exhibit three adaptations, which elevate their survival rate in the desert condition.  

first, is that they possess huge bodies, and can consume greater concentrations of food during a small period. secondly, they require to feed infrequently as they can accumulate fat in their tails. ultimately, their rate of metabolism is very low, so that they can burn their reservoirs of fat gradually.