Chapter 1.9 Active transport Flashcards
What is the definition of active transport?
Active transport is the movement of molecules across a membrane from a region of their lower concentration to a region of their higher concentration.
Where does active transport use energy from?
Active transport uses energy released from food in respiration to provide the energy required.
What does active transport allow plant root hairs to do?
Active transport allows plant root hairs to absorb mineral ions required for healthy growth from very dilute solutions in the soil against a concentration gradient.
What does active transport enable sugar molecules to be used for cell respiration?
Active transport enables sugar molecules used for cell respiration to be absorbed from lower concentrations in the gut into the blood where the concentration of sugar is higher.
How does active transport work in a cell?
Active transport is the movement of dissolved molecules into or out of a cell through the cell membrane, from a region of lower concentration to a region of higher concentration. Carrier proteins pick up specific molecules and take them through the cell membrane against the concentration gradient.
