Midterm_Answers_-_October,_2004

Midterm_Answers_-_October,_2004 - Short Answers for MidTerm...

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Short Answers for MidTerm 1 (Chemistry 170) 1. Mg(OH)2 causes a laxative effect while Al(OH)3 has a constipating effect, thus they can be used as a combination antacid preparation without undue side effects. 2. Foxglove leaves and salicylic acid are not related. 3. Cold viruses are easily transmitted by such simple acts as shaking hands. 4. An allergen triggers the release of histamine from mast cells. 5. Sulfua drugs have structures similar to para aminobenzoic acid (folic acid precursor). 6. PPA (phenylpropanolamine), a decongestant that was found in cold tablets, was also used in diet pills. 7. A variety of beliefs from the early history of drugs is still applicable today including the use of ipecac as an emetic. 8. Nitrous oxide, often used in the 1800s for euphoric effects is used today as a propellant in the food industry. 9. The incidence of colds tends to decrease with age. 10. Kissing a cold-infected person does not generally lead to the transmission of a cold. 11. There are a variety of factors associated with ulcers. One important one is that most gastric ulcers are not caused by high stomach acidity but rather by a bacterium, H. Pylori. 12. Tetracyclines cause teeth discoloration in children. 13. Aspirin shuts off the production of prostaglandins which are responsible for the sensation of pain in that they stimulate nerve endings. 14. Migraines are thought to be caused by a constriction and then dilation of blood vessels in the brain. 15. Propranolol and methylsergide maleate can be used to treat migraine; A.S.A. is effective to treat toxic vascular-type headaches. 16. Many of the drugs of the patent medicine era were alcohol-based and contained narcotics. Many of these preparations were never sold after the Food and Drug Act of 1906. 17. The mode of action of penicillins are associated with the interference of cell wall construction of bacteria; sulfa drugs interfere with folic acid incorporation by bacteria and tetracyclines inhibit protein synthesis by bacteria. 18. The most widely seen side-effect with aspirin is gastrointestinal bleeding.
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This note was uploaded on 12/02/2010 for the course EPSC EPSC 201 taught by Professor Alfredo during the Spring '09 term at McGill.

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Midterm_Answers_-_October,_2004 - Short Answers for MidTerm...

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