Nutrition: Concepts and Controversies - Standalone book (MindTap Course List)
14th Edition
ISBN: 9781305627994
Author: Frances Sizer, Ellie Whitney
Publisher: Brooks Cole
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Textbook Question
Chapter 3, Problem 5SC
Hormones
a. are rarely involved in disease processes.
b. are chemical messengers that travel from one system of cells to affect another.
c. are produced and remain inside single cells for intracellular communications.
d. are unaffected by nutrition status of the body.
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Chapter 3 Solutions
Nutrition: Concepts and Controversies - Standalone book (MindTap Course List)
Ch. 3 - Moderate alcohol use has been credited with...Ch. 3 - Your daughter is leaving for college in the fall....Ch. 3 - Cells a. are self-contained, living units. b....Ch. 3 - Each gene is a blueprint that directs the...Ch. 3 - Prob. 3SCCh. 3 - Prob. 4SCCh. 3 - Hormones a. are rarely involved in disease...Ch. 3 - Prob. 6SCCh. 3 - Prob. 7SCCh. 3 - Prob. 8SC
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- Researchers measured prolactin and growth hormone in the blood plasma of six subjects at regular intervals over a 24-hour period. The investigators were interested in determining if the levels of these two hormones cycle over a 24-hour period. The Figure presents the results of their experiments, with the y axis values showing the amount of each hormone expressed as a percentage of the 24-hour mean value, and each point showing the average of the six subjects levels. FIGURE Mean concentrations of prolactin and growth hormone in plasma, averaged for six subjects and expressed as a percentage of the average concentrations measured for the 24-hour period. Do the results support the hypothesis that the changes in prolactin level over a 24-hour period are associated with the sleepwake cycle? Source: From J. F. Sassin et al. 1972. Human prolactin: 24-hour pattern with increased release during sleep. Science 177:12051207.arrow_forwardWatch this video (http://openstaxcollege.org/l/fightflight) to learn more about adrenaline and the fightor-flight response. When someone is said to have a rush of adrenaline, the image of bungee jumpers or skydivers usually comes to mind. But adrenaline, also known as epinephrine, is an important chemical in coordinating the bodys fight-or-flight response. In this video, you look inside the physiology of the fight-or-flight response, as envisioned for a firefighter. His bodys reaction is the result of the sympathetic division of the autonomic nervous system causing system-wide changes as it prepares for extreme responses. What two changes does adrenaline bring about to help the skeletal muscle response?arrow_forwardBlood-feeding insects such as mosquitoes inject an anticoagulant into the victims bloodstream. How does this benefit the insect?arrow_forward
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