Prokaryotic and Eukaryotic Cells
Structure of Bacterial Cell
Cholera
-cholera causes diarrhoea and dehydration.
-sometimes, symptoms are not obvious and so transmission is rapid.
-when you drink or eat something with the pathogen Vibrio cholerae you can become ill.
-most cholera bacterium are killed by stomach acid, but some survive.
-if a bacterium reaches the small intestine it nestles into the mucus lining of the small intestine (by using their flagellum)
-the bacterium then produces a toxic protein that does two thing: binds to carbohydrate receptor proteins on cell surface membrane and causes ion channels on the cell surface membrane to open (this causes the cells chloride ions to diffuse into the lumen)
-this causes the water potential in the epithelial cells to be higher than that of the lumen, and so water moves via osmosis into the lumen.
-this movement creates new concentration gradients from the surrounding tissues and blood to the epithelial cells, furthering the movement of ions and water into the lumen.
-sometimes, symptoms are not obvious and so transmission is rapid.
-when you drink or eat something with the pathogen Vibrio cholerae you can become ill.
-most cholera bacterium are killed by stomach acid, but some survive.
-if a bacterium reaches the small intestine it nestles into the mucus lining of the small intestine (by using their flagellum)
-the bacterium then produces a toxic protein that does two thing: binds to carbohydrate receptor proteins on cell surface membrane and causes ion channels on the cell surface membrane to open (this causes the cells chloride ions to diffuse into the lumen)
-this causes the water potential in the epithelial cells to be higher than that of the lumen, and so water moves via osmosis into the lumen.
-this movement creates new concentration gradients from the surrounding tissues and blood to the epithelial cells, furthering the movement of ions and water into the lumen.