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Anatomy & PhysiologyCell Physiology

The Structure Most Responsible for Maintaining Cell Homeostasis Is the Plasma Membrane

The plasma membrane most directly maintains cell homeostasis by selectively controlling the movement of water, ions, nutrients, and wastes.

Question

The structure most responsible for maintaining cell homeostasis is the:

A. Plasma membrane

B. Ribosome

C. Nucleus

D. Mitochondrion

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Evidence boundary

“Most responsible” is a comparison among the four listed structures. Cellular homeostasis depends on coordinated metabolism, signaling, gene regulation, and transport; the answer does not claim that the plasma membrane acts alone. This page follows the Pearson plasma membrane, ribosome, nucleus, and mitochondrion option set and does not combine it with alternate versions of the question.