ACTIVE TRANSPORT Definition & Meaning

active transport

[ ak-tiv trans-pawrt ]

Phonetic (Standard)IPA

noun

the movement of ions or molecules across a cellular membrane from a lower to a higher concentration, requiring the consumption of energy.

active transport

noun

biochem physiol a process by which molecules are enabled to pass across a membrane from a region in which they are in a low concentration to one of high concentration; this requires the expenditure of energy in metabolism and is assisted by carrier proteins, commonly referred to as pumps

active transport

The movement of ions or molecules across a cell membrane in the direction opposite that of diffusion, that is, from an area of lower concentration to one of higher concentration. Active transport requires the assistance of a type of protein called a carrier protein, using energy supplied by ATP.

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�y��vlog History and Origins

Origin of active transport¹

First recorded in 1960–65

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Example Sentences

Examples have not been reviewed.

In November, Infrastructure Minister John O'Dowd launched a consultation on the active travel delivery plan and committed to spend £200m over the next decade on active transport schemes in towns across Northern Ireland.

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The researchers think that the animals' use of internal energy, or active transport, when moving the salts could be the explanation.

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Mr Azhar said a partnership approach, involving authorities and employers, was needed to promote healthy, affordable food, active transport and green spaces.

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The remaining emissions can be dramatically reduced by encouraging a shift toward electric vehicles powered by clean energy sources and toward active transport, like walking and biking.

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"It's great if the first choice is to be public transport and active transport - but that does mean the government has to change radically investment."

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