Partially Permeable Membrane - GCSE Biology Definition

Reviewed by: Lára Marie McIvor

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A partially permeable membrane is a thin barrier that allows certain small molecules to pass through it while blocking others. In biology, it is important for processes like osmosis, where water moves across the membrane from a region of low solute concentration to a region of high solute concentration. These membranes are found in living cells and help control what enters and leaves, such as nutrients, water, and waste. This selective passage is crucial for maintaining the right conditions for cell function and health.

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Lára Marie McIvor

Reviewer: Lára Marie McIvor

Expertise: Biology, Psychology & Sociology Subject Lead

Lára graduated from Oxford University in Biological Sciences and has now been a science tutor working in the UK for several years. Lára has a particular interest in the area of infectious disease and epidemiology, and enjoys creating original educational materials that develop confidence and facilitate learning.

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