Ions And Organisms

BIOL5: Practice Essay Ions and organisms (25 marks) An organism is any living thing. on that point be numerous types of organisms, which are grouped into Kingdoms and eventually Species. An ion is a charged species; it is either positively or negatively charged, and it lowlife be any element from the periodic table, for instance, the chloride ion, Cl-, or the atomic number 11 ion, Na+. In this essay the processes including various ions related to the organisms in the ingraft and Animal Kingdoms will be explored. Cholera is a affection which affects humans, it was examined in BIOL1. The cholera bacterium produces a toxin that affects the chloride ion supercede in the small intestine. Firstly, the toxin causes the chloride ion passs of the epithelial cell plasma membranes in the small intestine to open. This opening causes chloride ions to rush through the ion strain from the epithelial cell into the lm of the small intestine. Since to a great extent and more chloride ions move into the lumen, the Cl- ion concentration in the lumen increases, leading to a decrease in piddle capableness of the lumen. This peeing potence change causes urine from the blood to move crossways the epithelial cells into the lumen of the small intestine by osmosis. This pissing bm is quite rapid, in order to increase the water possible of the lumen. The massive water secretion results in uttermost(a) diarrhoea, cause the body to become extremely dehydrated. In umteen cases, oddly cases in developing countries, an Oral Rehydration Solution (ORS) is apply as treatment to replace the lost fluid. An ORS is water which has turn salts, much(prenominal) as Na+ and Cl-, and dissolved sugars, such as glucose and sucrose. Plants go for specialised cells which aid the efficient absorption of water and mineral ions. This was examined in BIOL2. Root hair cells allow the absorption of water due to the difference in ion concentrations and hence water potential between the soil and roots. Water! moves from a higher water...If you lack to get a full essay, order it on our website: OrderEssay.net

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