Multiple Choice
In the process of osmosis, is the movement of water in and out of blood cells considered active or passive transport?
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6. The Membrane
Passive vs. Active Transport
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Which of the following statements is true about passive transport?
A
It moves substances against their concentration gradient.
B
It requires energy in the form of ATP.
C
It is a type of endocytosis.
D
It involves the movement of molecules from high to low concentration.
Verified step by step guidance1
Understand the concept of passive transport: Passive transport is a biological process that moves molecules across cell membranes without the need for energy input.
Identify the concentration gradient: In passive transport, substances move from an area of higher concentration to an area of lower concentration, following the natural gradient.
Differentiate from active transport: Unlike passive transport, active transport requires energy, usually in the form of ATP, to move substances against their concentration gradient.
Recognize types of passive transport: Common types include diffusion, osmosis, and facilitated diffusion, all of which do not require cellular energy.
Evaluate the given statements: The statement 'It involves the movement of molecules from high to low concentration' aligns with the definition of passive transport, making it the correct choice.
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