anatomy homework

anatomy homework - organophosphate poisoning? (5points)...

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Due Oct.7, 2010 Biology 301 Home Work # 1 Fall 2010 Alissa Segiet 0002 Name Lab Section number The answers cannot be more than 4 lines. They must be written in a scientific language. Longer answers will be penalized by point deductions . 1. Cancer is abnormal, uncontrolled cell division. What property of epithelial tissues might (and does) make them more prone to developing cancer? ( 5points) The frequency of reproduction in epithelial tissue is what makes them more prone to developing cancer. Epithelial layers are composed of a sheet of cells, which makeup the linings and surfaces of the body. In cancer it is the replication that goes awry, this is why epithelial tissue is more prone 2. Many potent insecticides contain toxins called organophosphates. Ivan is using such an insecticide and is very careless. Because he does not use gloves or a dust mask he absorbs some of the chemicals through his skin and inhales a large amount as well. What signs would you expect to observe in Ivan as a result of
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Unformatted text preview: organophosphate poisoning? (5points) Organophosphate functions by inhibiting the action of acetylcholinesterase (AChE) in nerve cells. Within 24 hours of exposure the body will experience excessive salvation, tears, urination, diarrhea, vomiting, breathing problems and extreme anxiety. Bronchoconstriction and an increase in bronchial secretions may also occur. 3. The following drugs have an effect on muscles. State exactly how they act and their use. (5 points) Pavulon- Medication used in general anesthesia, usually as induction of paralysis for intubation. It is a competitive Ach antagonist at neuromuscular junctions. Pavulon works at all muscle (smooth and skeletal). Dantrolene- Works only in skeletal muscle. Dantrolene works by decreasing intracellular calcium, which decreases contraction of skeletal muscle. Usually used to treat malignant hyperthermia, which is a side effect of general anesthesia where the skeletal muscles become extremely rigid....
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