Cholera and Prokaryotic cells
- Created by: EleanorRose.
- Created on: 01-02-15 20:07
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- Cholera and prokaryotic cells
- Prokaryotic cells are only bacteria and blue/green algae
- Prokaryotic cells have no distinct nucleus, a polypeptide and polysaccharide cell wall, a slime capsule outer, a large flagella for movement, a plasma membrane
- Cholera is caused by Vibrio cholerae
- It breeds rapidly in water
- Mainly in Africa, Asia and SOuth America
- Prokaryotic cells enter the digestive system via contaminated water
- Symptoms aren't always shown or if they are shown it is normally mild
- Bacteria is still present in faeces between 7 and 14 days which can lead to easy transmission
- Severe diarrhea is caused which leads to severe dehydration
- Bacteria in the small intestine uses a flagella to move through the mucus into the gut wall and then creates toxins
- This causes epithelial cells to pump chloride ions into the intestine lumen
- This creates a more negative water potential causing water to move by osmosis into the gut lumen
- Water and salts are lost through faeces
- This creates a more negative water potential causing water to move by osmosis into the gut lumen
- This causes epithelial cells to pump chloride ions into the intestine lumen
- Oral rehydration- usually a drinkable solution or powder added to water that contains mineral ions, water, salt and glucose
- The sodium ions and the glucose allow co-transport to occur
- Sodium ions are taken into the gut wall creating a more negative water potential in the gut wall
- This causes water to diffuse into the epithelial cells and then into the blood
- Osmotic diarrhoea
- this is when treatment makes the diarrhoea worse
- Excess glucose caused osmotic diarrhoea so the glucose levels had to be reduced
- this is when treatment makes the diarrhoea worse
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