Definitions for active transport

This page provides all possible meanings and translations of the word active transport

Random House Webster's College Dictionary

ac′tive trans′port(n.)

  1. the movement of ions or molecules across a cellular membrane from a lower to a higher concentration.

    Category: Biochemistry, Chemistry, Physiology

Origin of active transport:

1960–65

Princeton's WordNet

  1. active transport(noun)

    transport of a substance (as a protein or drug) across a cell membrane against the concentration gradient; requires an expenditure of energy

Freebase

  1. Active transport

    Active transport is the movement of all types of molecules across a cell membrane against its concentration gradient. In all cells, this is usually concerned with accumulating high concentrations of molecules that the cell needs, such as ions, glucose and amino acids. If the process uses chemical energy, such as from adenosine triphosphate, it is termed primary active transport. Secondary active transport involves the use of an electrochemical gradient. Active transport uses cellular energy, unlike passive transport, which does not use cellular energy. Active transport is a good example of a process for which cells require energy. Examples of active transport include the uptake of glucose in the intestines in humans and the uptake of mineral ions into root hair cells of plants.

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