Question

the cell membrane and the cytoplasm work together to regulate a cells internal environment. how do these two structures most effectively function? a the cytoplasm provides a rigid boundary while the membrane fills the cell with nutrients. b both the membrane and the cytoplasm are impermeable to all molecules, preventing any exchange with the outside. c the membrane controls the movement of substances, while the cytoplasm provides a stable medium for chemical reactions. d the cytoplasm is primarily for waste storage, while the membrane is for energy production.

Explanation:

The cell - membrane is a selectively permeable barrier that controls the movement of substances in and out of the cell. The cytoplasm is the gel - like substance within the cell where many chemical reactions occur. Option A is incorrect as the cytoplasm is not a rigid boundary and the membrane does not 'fill' the cell with nutrients alone. Option B is wrong because the membrane is selectively permeable, not impermeable. Option D is incorrect as the cytoplasm is not for waste storage and the membrane is not for energy production.

Answer:

C. The membrane controls the movement of substances, while the cytoplasm provides a stable medium for chemical reactions.