Absorption of Glucose in the Ileum
- Section 2 - Cells - transport across cell membranes
- how glucose is transported to the blood stream
- Created by: himmz
- Created on: 23-09-20 15:03
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- Absorption of Glucose in the Ileum
- 1. Na+ ions are actively transported out of epithelial cells by the Na-K pump.
- 2. This maintains a much higher concentration of Na+ ions in the lumen of the intestine than the epithelial cells.
- 3. Na+ ions will diffuse into epithelial cells down this concentration gradient via a co-transport protein. As the Na+ enter, glucose molecules enter at the same time.
- 4. The glucose is passed into the blood stream by facilitated diffusion via a carrier protein.
- Glucose can be used for an immediate energy source in the body.
- Glucose is used in both types of respiration.
- Glucose can be used for an immediate energy source in the body.
- Glucose moves against its concentration gradient. Instead of using ATP, is uses Na+ concentration gradient.
- Co-transport is an indirect form of active transport.
- 4. The glucose is passed into the blood stream by facilitated diffusion via a carrier protein.
- 3. Na+ ions will diffuse into epithelial cells down this concentration gradient via a co-transport protein. As the Na+ enter, glucose molecules enter at the same time.
- Na+ leaves while K+ enters.
- Active transport uses energy in the form of ATP.
- 2. This maintains a much higher concentration of Na+ ions in the lumen of the intestine than the epithelial cells.
- 1. Na+ ions are actively transported out of epithelial cells by the Na-K pump.
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