Life: The Science of Biology
11th Edition
ISBN: 9781319010164
Author: David E. Sadava, David M. Hillis, H. Craig Heller, Sally D. Hacker
Publisher: W. H. Freeman
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Chapter 42.5, Problem 2R
Summary Introduction
To review:
The difference between the mechanism of action of the contragestational pill, such as RU-486 and contraceptive pill, despite acting through progesterone signaling.
Introduction:
Oral contraceptive pills and contragestational pills are taken by women to avoid the unwanted pregnancy. Although both of them involve progesterone signaling, the mechanism of action is different in both the cases.
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Life: The Science of Biology
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- The pill RU-486 produces abortions by blocking the effects of progesterone. Why would blocking progesterone interfere with pregnancy?arrow_forwardWhy are the eicosanoids often called “local hormones”?arrow_forwardTwo steps in the synthesis of tadalafil, a drug sold under the trade nameCialis for the treatment of erectile dysfunction, are shown. Identifyintermediate A, and draw a mechanism for the conversion of A totadalafil.arrow_forward
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- List three different menopausal symptoms that can be counteracted by HRT (hormone replacement therapy). What is the reason why both estrogen and progestin are often included in these preparations?arrow_forwardWhy is the fact that a monomeric hormone binds simultaneously to two identical receptor molecules, thus promoting the formation of a dimer of the receptor, considered remarkable?arrow_forwardCan you please explain the Physical and Chemical action of Sertraline?arrow_forward
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