Transport across cell membranes

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National 5 Biology (1.2 Transport across cell membranes) Flashcards on Transport across cell membranes, created by kalina on 02/02/2014.
kalina
Flashcards by kalina, updated more than 1 year ago
kalina
Created by kalina almost 11 years ago
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Question Answer
What is the cell membrane composed of? Lipid and protein.
What two words can describe the cell membrane? Selectively permeable.
What is the difference in a concentration of a substance called? The concentration gradient.
What is passive transport? Substance doesn't require additional energy to move. The movement of molecules down the concentration gradient (from high to low)
What are the two examples of passive transport? Diffusion and osmosis.
What is diffusion? The movement of substances from a high concentration to a low concentration down a concentration gradient.
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