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Cell Homeostasis

Question 3 • 26-27 RPA- Biology 1/2 CR

In active transport, molecules are moved across the cell membrane with the help of

Answer
A
neurons.
B
electrical impulses.
C
proteins.
D
inhibitors.

Explanation

Active transport moves substances across a cell membrane, often against their concentration gradient, so it requires energy. Membrane proteins act as pumps or carriers to move those substances through the membrane. Neurons and electrical impulses are not the transport mechanism, and inhibitors usually slow or block a process rather than help it.

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