Solns prob set #1

Solns prob set #1 - BIPN 108, Physiology of...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
BIPN 108, Physiology of Exercise--Problem set #1 solutions Page 1 1. a. There is no government regulation or oversight of the nutritional supplement industry (despite efforts on the part of consumer interest groups to bring the industry into the realm of the U.S. Food and Drug Administration). As a result, there is no testing and hence no requirement or guarantee that the ingredients listed on the label are the ingredients in the bottle. b. The company's only study is deeply flawed. The first obvious problem is that all of the people in the study were treated the same way. They all had colds already, and all were given Airborne. In a much better experiment, a large number of healthy subjects would be divided into at least four groups. The number of people in each group should be large to control for individual differences in susceptibility to colds. Subjects in the groups would receive one of the following treatments: Exposed to cold virus, treated with something that looks just like Airborne, but that is known to have no effect on whether or not you catch a cold(a placebo) Not exposed to cold virus, treated with something that looks just like Airborne Exposed to cold virus, treated with Airborne Not exposed to cold virus, treated with Airborne The number of subjects who caught colds over some period--say 7 days--would be recorded and the duration of their colds would be noted. (In fact, a lot of evidence indicates that untreated colds usually last about 5 days, so the subjects in the company’s study probably would have gotten over their cold in the 5 day period without Airborne, but the company didn't do controls, so they don't know. c. The placebo effect might well account for at least some of the people who felt better within 24 hours. Others may just have been getting well on their own, independent of the Airborne. 2. a. Anabolic steroids increase the production of muscles (+ sign on the arrow connecting the two boxes) and thus increase the size of muscles--especially if they are taken in conjunction with lifting heavy weights, which also increases muscle size. b. Exogenous anabolic steroids decrease the release of LHRH, which reduces the secretion of FSH and LH, which reduces the secretion of the man’s own testosterone. c. An increase in circulating FSH and LH increases the secretion of testosterone by the testes, and
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/19/2008 for the course BIPN 108 taught by Professor French during the Winter '08 term at UCSD.

Page1 / 4

Solns prob set #1 - BIPN 108, Physiology of...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online