Multiple Choice
Which of the following will pass through a cell membrane most easily?
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6. The Membrane
Biological Membranes
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What is a selectively permeable membrane?
A
A membrane that allows all substances to pass through freely.
B
A membrane that allows only certain molecules to pass through while blocking others.
C
A membrane that allows only water to pass through.
D
A membrane that is impermeable to all substances.
Verified step by step guidance1
Understand the concept of a selectively permeable membrane: It is a biological membrane that allows certain molecules or ions to pass through it by means of active or passive transport.
Recognize that selectively permeable membranes are crucial for maintaining homeostasis within cells by regulating the movement of substances.
Identify the types of molecules that can typically pass through a selectively permeable membrane, such as small nonpolar molecules, water, and certain ions, while larger or charged molecules may be restricted.
Consider the mechanisms involved in selective permeability, including diffusion, osmosis, and active transport, which help control the movement of substances across the membrane.
Reflect on the importance of selectively permeable membranes in biological systems, such as the cell membrane, which plays a key role in protecting the cell and facilitating communication and nutrient exchange.
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