About Lesson
Active transport
This is the movement of solute molecules or ions from their region of low concentration to their region of high concentration (against the concentration gradient) across a cell membrane with the expenditure of energy and carrier molecules.
This is the movement of solute molecules or ions against concentration gradient across a cell membrane with expenditure of energy and carrier molecules.
The molecules or ions move from their region of low concentration to their region of high concentration.
Conditions necessary for active transport
- Energy: Therefore, it can only take place in living systems, which produce energy by respiration.
- Carrier molecules
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