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Dictionary » A » Active transport Active transportDefinition noun A kind of transport wherein ions or molecules move against a concentration gradient, which means movement in the direction opposite that of diffusion – or – movement from an area of lower concentration to an area of higher concentration. Hence, this process will require expenditure of energy, and the assistance of a type of protein called a carrier protein.
The movement of a substance across a membrane from a region of its lower concentration to a region of its higher concentration against a concentration gradient, using energy. This energy is supplied through respiration using ATP. Mitochondria ( cell organelles in the cytoplasm) control energy release. Respiratory poisons block energy release, so they can prevent active transport. Common sites of active transport are root hair cells the wall of small intestine(villi).
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Results from our forumRe: Compare and Contrast Active and Passive Transport?In active transport mollecules or ions move from at the region of lower concentration to the region of higher concentration ...
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Compare and Contrast Active and Passive Transport?active transport involves usage of ATP molecules \passive transport does not. active transport takes place against conc.gradient\it ...
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Re: Compare and Contrast Active and Passive Transport?Nice surprise about this shorter form. Can you tell us what it is you are talking/writing about? Has any info. about this shorter form been posted before (and i just missed it)?
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BiochemistryQuick Question Here... Which type of transport relied on the driving energy of a gradient? a. Active b. Facilitated c. Passive d. Pumped e. ATP mediated
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