active transport 1.3.3

• active transport is the movement of a substance from an area of lower concentration to an area of higher concentration, against a concentration gradient, using energy
• the rate of active transport depends on how much protein the cell has by cell respiration
• an example of active transport being used is glucose absorbing into the bloodstream
• a cell that carries out lots of active transport has lots of mitochondria because mitochondria are the site of respiration that releases the energy active transport needs
• active transport allows mineral ions to be absorbed into plant root hairs from very dilute solutions in the soil