It seems like there are a few typos in your question, but I understand you're asking about the functions of the cell membrane in maintaining homeostasis within a cell. Here are three correct functions of the cell membrane that help maintain homeostasis:
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Selective Permeability: The cell membrane regulates what enters and exits the cell, allowing essential nutrients to enter while keeping unwanted substances out. This selective permeability is crucial for maintaining the appropriate concentrations of ions and molecules within the cell.
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Transport Mechanisms: The cell membrane employs various transport mechanisms, such as passive and active transport, to control the movement of substances. For example, it allows for the regulated intake of water and nutrients and the removal of waste products, helping to maintain a balanced internal environment.
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Cell Signaling: The cell membrane contains receptors that detect changes in the external environment and communicate these changes to the cell. This signaling allows the cell to respond appropriately to different stimuli, further helping to maintain homeostasis by adjusting its internal processes as needed.
These functions collectively contribute to the maintenance of a stable internal environment, or homeostasis, within the cell.