Which type of absorption allows molecules to pass through the membrane freely without energy expenditure?
Understand the Problem
The question is asking which method of absorption permits molecules to pass through a membrane without requiring energy. The options provided suggest different transport mechanisms in cellular biology, and the answer sought is one that is known to occur naturally without energy input.
Answer
Passive transport.
The type of absorption that allows molecules to pass through the membrane freely without energy expenditure is passive transport.
Answer for screen readers
The type of absorption that allows molecules to pass through the membrane freely without energy expenditure is passive transport.
More Information
Passive transport includes processes like diffusion and osmosis, where molecules move naturally down their concentration gradient without the need for energy. This is essential for many physiological processes in cells.
Tips
A common mistake is confusing passive transport with active transport. Remember that passive transport does not use energy, whereas active transport does.
Sources
- Diffusion and passive transport - Khan Academy - khanacademy.org
- Transport of Small Molecules - The Cell - NCBI Bookshelf - ncbi.nlm.nih.gov
- 3.5 Passive Transport – Concepts of Biology - opentextbc.ca
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