active transport
Movement of ions or molecules across a cell membrane into a region of higher…Movement of ions or molecules across a cell membrane into a region of higher concentration, assisted by enzymes and requiring energy.
Meaning
2 senses(uncountable)Movement of ions or molecules across a cell membrane into a region of higher concentration, assisted by enzymes and requiring energy.
transport of a substance (as a protein or drug) across a cell membrane against the concentration gradient; requires an expenditure of energy
(uncountable)Walking and cycling as means of travel.
Translations
2 languagesLessons for this word
1 lessons- A1Countable and uncountable nouns — Because it can be uncountable