Question

4. Explain how selective permeability maintains homeostasis within a cell. In your answer, define homeostasis.

5. These days, we are asked to wash our hands with soap for 20 seconds. Why? What does that (scrubbing
WITH SOAP) do to this virus, and why does it take 20 seconds?

Answer 1

Selective permeability in cell membranes is critical for maintaining homeostasis by controlling the passage of substances in and out of the cell.

Step-by-step explanation:

Selective permeability is a critical feature of cell membranes that allows them to maintain homeostasis. Homeostasis refers to the stable internal environment of a cell or organism. In the context of a cell, selective permeability refers to the ability of the cell membrane to control the passage of substances into and out of the cell.

The cell membrane is selectively permeable because it only allows certain molecules to pass through while preventing others from entering or leaving the cell. This is achieved through various mechanisms such as transport proteins, ion channels, and carrier proteins.

For example, the cell membrane may allow the passage of small molecules like oxygen and carbon dioxide through diffusion, while larger molecules like proteins or ions require specific transport proteins for entry or exit.

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