Which of the following is responsible, in part, for keeping the cytoplasm of red blood cells isotonic with the blood plasma, and thereby preventing either lysis or shrinking of the cells?
A)facilitated diffusion
B)sodium channels
C)the sodium/potassium pump
D)osmosis

Question

Quizplus · Accepted Answer

The sodium/potassium pump is responsible for maintaining the concentration gradient of sodium and potassium ions across the cell membrane, which helps to regulate the osmotic balance of the cell. This helps to keep the cytoplasm of red blood cells isotonic with the blood plasma, preventing lysis or shrinking of the cells. Facilitated diffusion (A) and sodium channels (B) are not directly involved in maintaining osmotic balance, and osmosis (D) is a passive process that can contribute to changes in cell volume but is not responsible for regulating osmotic balance.

Which of the Following Is Responsible, in Part, for Keeping