Active Transport Flashcards
What is active transport
Moving substances against a concentration gradient from an area of lower concentration to an area of higher concentration
What does active transport require that diffusion does not
Energy provided by respiration
What happens in active transport
The solute molecule is recognised and grabbed by transport protein
Protein rotates in the membrane and releases the solute inside the cell (using energy)
Give examples of where active transport occurs
In root hair cells, in the gut in the kidney, in the salt glands of marine animals
What does active transport allow plants to do ?
Active transport allows plants to absorb minerals from a very dilute solution against a concentration gradient this is essential for its growth
What is the purpose of active transport in the gut
To take glucose into the blood stream when its concentration is higher in the blood than in the gut it can then be transported to cells for respiration
Describe the uses of active transport in plants and animals
Plant - to move MINERALS in the soil into the root hair cells
Animals - to move GLUCOSE from the small intestine into the blood
