4
AssignmentMultiple Select

Moving Cellular Material

Question 4 • Anatomy & Physiology A

Why is it important that the cell membrane is selectively permeable? Check all that apply.

Answer
A
It prevents water from leaving the cell.
B
It allows nutrients to enter the cell.
C
It provides a barrier against disease-causing agents.
D
It enables cells to interact with their environment.

Explanation

A selectively permeable membrane controls what can cross the cell boundary. This lets needed nutrients enter, helps keep harmful disease-causing agents out, and allows the cell to respond to its environment through membrane proteins and receptors. A is not correct because selective permeability does not prevent all water from leaving the cell; water can move across the membrane.

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