Diffusion of substances across a membrane without the use of energy is termed:
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Correct answer: Passive transport
Passive transport allows molecules to move across the membrane along their concentration gradient without energy expenditure. Simple diffusion and facilitated diffusion are both examples of passive transport.
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More Plasma Membrane: Models and Transport questions
- Which of the following substances can easily pass through the plasma membrane by simple diffusion?
- The movement of water across a selectively permeable membrane is called:
- Which protein facilitates the rapid movement of water molecules across the plasma membrane?
- Active transport across the plasma membrane is characterized by:
- Which of the following is an example of primary active transport?
- In the fluid mosaic model, membrane proteins are described as: