Cholera
- Created by: Ellie Rivers
- Created on: 11-05-13 12:41
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- Cholera
- has...
- capsule
- cell surface membrane
- flagellum
- 70s ribosomes
- cell wall
- circular DNA
- plasmids
- Oral Rehydration Solutions
- rehydration solution must contain:
- Glucose - to stimulate uptake of sodium and energy
- Sodium - to replace sodium ions lost
- Potassium - replace lost potassium ions
- Water - to rehydrate
- Electrolytes - prevent electrolyte imbalance
- just drinking water is not effective because it does not replace ions
- rehydration solution must contain:
- caused by a bacteria
- a PROKARYOTIC ORGANISM
- Disease
- the loss of chloride ions increases the cells water potential
- they produce a toxin protein which binds to the epithelial cells in the small intestine
- the toxin enters the cell and opens the ion channels in the cell
- main symptom is diarrhoea and consequently dehydration
- chloride ions then flood into the lumen of the small intestine
- the increase of chloride ions in the lumen lowers the water potential
- water moves from the cells into the lumen
- this establishes a concentration gradient so ions move into the epithelial cells from surrounding tissues
- this causes a water potential gradient so water moves from the blood into the intestine
- this loss of water causes severe diarrhoea and dehydration
- has...
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