The control of blood glucose 2
- Created by: rahza
- Created on: 19-08-17 16:28
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- Insulin
- signalling molecule
- protein
- cannot pass through cell membrane to stimulate the mechanism within the cell
- insulin binds to a receptor in the cell surface membrane
- cannot pass through cell membrane to stimulate the mechanism within the cell
- And affects the cell indirectly through the mediation of intracellular messenger
- insulin receptors are on many cells for eg: on liver cells
- Insulin stimulates cells with these receptors to increase the rate at which they absorb glucose from the blood, convert it in to glycogen and use it in respiration.
- This results in a decrease in the concentration of glucose in the blood.
- Insulin stimulates cells with these receptors to increase the rate at which they absorb glucose from the blood, convert it in to glycogen and use it in respiration.
- insulin receptors are on many cells for eg: on liver cells
- stimulates the activation of the enzyme glucokinase, which phosphorylates glucose
- This traps glucose inside cells, because phosphorylated glucosecannot pass through the transporters in the cell surface membrane
- stimulates the activation of two other enzymes, phosphofructokinase and glycogensynthase, which together add glucose molecules to glycogen. This increases the size of the glycogen granules inside the cell
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