close solutoin list

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 sleep–wake cycle? Source: From J. F. Sassin et al. 1972. Human prolactin: 24-hour pattern with increased release during sleep. Science 177:1205–1207.

BuyFind

Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
Publisher: Cengage Learning
ISBN: 9781305389892
BuyFind

Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
Publisher: Cengage Learning
ISBN: 9781305389892

Solutions

Chapter
Section
Chapter 42, Problem 4ITD
Textbook Problem

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.

Chapter 42, Problem 4ITD, Researchers measured prolactin and growth hormone in the blood plasma of six subjects at regular

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 sleep–wake cycle?

Source: From J. F. Sassin et al. 1972. Human prolactin: 24-hour pattern with increased release during sleep. Science 177:1205–1207.

Expert Solution

Want to see this answer and more?

Experts are waiting 24/7 to provide step-by-step solutions in as fast as 30 minutes!*

See Solution

*Response times vary by subject and question complexity. Median response time is 34 minutes and may be longer for new subjects.

Chapter 42 Solutions

Biology: The Dynamic Science (MindTap Course List)
Show all chapter solutions

Additional Science Textbook Solutions

Find more solutions based on key concepts
Show solutions
In what way has biotechnology had an impact on agriculture in the United States?

Human Heredity: Principles and Issues (MindTap Course List)

How does the CNO cycle differ from the proton-proton chain? How is it similar?

Horizons: Exploring the Universe (MindTap Course List)

Chemical digestion of all nutrients mainly occurs in which organ? a. mouth b. stomach c. small intestine d. lar...

Nutrition: Concepts and Controversies - Standalone book (MindTap Course List)

Why is the oxidation of fatty acids referred to as -oxidation?

Chemistry for Today: General, Organic, and Biochemistry

Rank the electric potentials at the four points shown in Figure OQ25.7 from largest to smallest.

Physics for Scientists and Engineers, Technology Update (No access codes included)

Match the term listed in Column A with its definition from Column B

Nutrition Through the Life Cycle (MindTap Course List)

Can you associate electric potential energy with an isolated charged particle? Explain.

Physics for Scientists and Engineers: Foundations and Connections

Why do you think the mid-ocean ridges are higher than the surrounding seabed?

Oceanography: An Invitation To Marine Science, Loose-leaf Versin