Question

how does the cellular membrane of the finger mullet’s cell contribute to homeostasis within the cell?
a it serves as a solid membrane, allowing no materials to pass into and out of the cell.
b it serves as an impermeable membrane, allowing only water to move into and out of the cell.
c it serves as a selectively permeable membrane, allowing water and other materials to move into and out of the cell as needed.
d it serves as a permeable membrane, allowing any material to easily pass into and out of the cell, whether needed or not.

Explanation:

To determine the correct answer, we analyze the function of a cell membrane in maintaining homeostasis. A cell membrane is selectively permeable, meaning it allows certain substances (like water, nutrients, etc.) to move in and out as needed while restricting others.

• Option A is incorrect because cell membranes are not solid and do allow materials to pass (selectively).
• Option B is incorrect as cell membranes allow more than just water to move in/out.
• Option C correctly describes the cell membrane as selectively permeable, allowing necessary materials to move in and out.
• Option D is incorrect because the membrane is not freely permeable to all materials; it is selective (to maintain homeostasis by controlling what enters/exits based on need).

Answer:

C. It serves as a selectively permeable membrane, allowing water and other materials to move into and out of the cell as needed.