Multiple Choice
What is a major difference between facilitated diffusion and active transport?
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6. The Membrane
Passive vs. Active Transport
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Which of the following are types of passive transport?
A
Diffusion
B
Endocytosis
C
Exocytosis
D
Osmosis
Verified step by step guidance1
Understand the concept of passive transport: Passive transport is the movement of molecules across a cell membrane without the need for energy input from the cell. It relies on the concentration gradient, moving substances from an area of higher concentration to an area of lower concentration.
Identify the types of passive transport: The main types of passive transport include diffusion, osmosis, and facilitated diffusion.
Define diffusion: Diffusion is the process by which molecules spread from areas of high concentration to areas of low concentration until equilibrium is reached. It is a fundamental type of passive transport.
Define osmosis: Osmosis is a specific type of diffusion that involves the movement of water molecules through a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.
Differentiate from active transport: Recognize that endocytosis and exocytosis are not types of passive transport. They are forms of active transport, which require energy to move substances into or out of the cell, often against a concentration gradient.
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