An example of a cell maintaining homeostasis at the cellular level is when a cell takes up potassium to maintain the proper cytoplasmic concentration. This process is crucial for the cell’s normal functioning and survival.
Homeostasis refers to the ability of a cell or organism to maintain a stable internal environment despite changes in external conditions. In this case, the cell regulates the concentration of potassium ions within its cytoplasm to ensure that it remains within the optimal range. This is essential for various cellular processes, including enzyme activity, protein synthesis, and the maintenance of the cell’s electrical potential.
When the concentration of potassium ions in the cytoplasm is too low, the cell actively transports potassium ions from the extracellular fluid into the cytoplasm. Conversely, if the concentration is too high, the cell may expel excess potassium ions. This regulation helps to maintain the cell’s internal environment and ensures that it can function properly.
Other options, such as a cell of the intestine secreting digestive enzymes, a muscle cell contracting, or a sperm fertilizing an egg, are examples of specific cellular functions but do not directly relate to the maintenance of homeostasis at the cellular level.