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The movement of substances from higher to lower concentration across a semipermeable membrane that must have a specific protein carrier but no energy

The movement of substances from higher to lower concentration across a semipermeable membrane that must have a specific protein carrier but no energy

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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**Quiz Question: Understanding Transport Mechanisms** The movement of substances from higher to lower concentration across a semipermeable membrane that must have a specific protein carrier but no energy expenditure is called: - ○ Active Transport - ○ Endocytosis - ○ Diffusion - ○ Facilitated Diffusion - ○ Osmosis **Explanation of Graphs and Diagrams:** There are no graphs or diagrams accompanying this question. **Correct Answer:** Facilitated Diffusion **Explanation:** Facilitated diffusion is a type of passive transport that moves substances across a cell membrane with the help of specific protein carriers or channels. Unlike active transport, facilitated diffusion does not require energy expenditure because it moves substances down their concentration gradient. This process is crucial for the passage of certain large or polar molecules that cannot diffuse through the lipid bilayer of the membrane on their own.
Transcribed Image Text:**Quiz Question: Understanding Transport Mechanisms** The movement of substances from higher to lower concentration across a semipermeable membrane that must have a specific protein carrier but no energy expenditure is called: - ○ Active Transport - ○ Endocytosis - ○ Diffusion - ○ Facilitated Diffusion - ○ Osmosis **Explanation of Graphs and Diagrams:** There are no graphs or diagrams accompanying this question. **Correct Answer:** Facilitated Diffusion **Explanation:** Facilitated diffusion is a type of passive transport that moves substances across a cell membrane with the help of specific protein carriers or channels. Unlike active transport, facilitated diffusion does not require energy expenditure because it moves substances down their concentration gradient. This process is crucial for the passage of certain large or polar molecules that cannot diffuse through the lipid bilayer of the membrane on their own.
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