BRAINCAKEAbsorption of Monosaccharides
On the membrane of the epithelial cell adjacent to the blood the sodium-potassium pump removes sodium from the epithelial cell lowering its concentration inside the epithelial cell.
On the membrane adjacent to the lumen the co-transport protein allows the passage of sodium into the cell by facilitated diffusion.
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Key terms in this lesson
- diffusion
- The net passive movement of molecules or ions from a region of higher concentration to a region of lower concentration, down a concentration gradient.
- facilitated diffusion
- The passive movement of molecules or ions down their concentration gradient through protein channels or carrier proteins.
- co-transport
- The movement of one molecule or ion across a membrane, using a carrier protein, coupled to the facilitated diffusion of another down its concentration gradient.
More in Digestion
- The Digestive System
- Carbohydrate Digestion
- Lipid Digestion
- Protein Digestion
- Structure of the Ileum
- Absorption of Amino Acids
- Absorption of Triglycerides
- Absorption of Fatty Acids
All 10 lessons in Digestion · All AQA AS-level Biology topics