One of the mysteries of the English language finally explained.
The movement of ions or molecules across a cell membrane into a region of higher concentration, assisted by enzymes and requiring energy.
- ‘Complex processes regulate both passive and active transport across the nuclear membrane.’
- ‘The electrocytes establish a charge difference across the cell membranes, presumably by active transport of ions.’
- ‘The enzyme isoforms seem to have a tissue-specific expression, showing the highest expression levels in cells where intense active transport is expected to occur.’
- ‘The proximal tubule is the site of most secretion, reabsorption, and active transport.’
- ‘Uric acid, formed from nucleic acids, is reabsorbed from filtrate by active transport, and a small portion is actively secreted into the urine.’
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