Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN: 9781305389892
Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher: Cengage Learning
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Chapter 42, Problem 3ITD
Summary Introduction
To review:
Whether there is any consistent relationship between the patterns of prolactin and growth hormone in plasma in the 24-hour period.
Introduction:
Lactation is the process of secretion of the milk from mammary glands. There are different hormones that influence this secretion, namely, the human placental lactogen, estrogen, prolactin, progesterone, oxytocin, follicle stimulating hormone, luteinizing hormone, human chorionic gonadotropin, growth hormone, and adrenocorticotropic hormone. The growth hormone also regulates cell regeneration and cell reproduction.
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Chapter 42 Solutions
Biology: The Dynamic Science (MindTap Course List)
Ch. 42.1 - What is the difference between a hormone and an...Ch. 42.1 - How is endocrine signaling different from...Ch. 42.2 - Prob. 1SBCh. 42.2 - Prob. 2SBCh. 42.3 - Prob. 1SBCh. 42.3 - Prob. 2SBCh. 42.4 - What effect does parathyroid hormone have on the...Ch. 42.4 - Prob. 2SBCh. 42.4 - Prob. 3SBCh. 42.4 - Prob. 4SB
Ch. 42.5 - How do hormones compare structurally and...Ch. 42 - Prob. 1TYKCh. 42 - Prob. 2TYKCh. 42 - When the concentration of thyroid hormone in the...Ch. 42 - Which of the following statements about endocrine...Ch. 42 - Prob. 5TYKCh. 42 - Prob. 6TYKCh. 42 - If the human body is stressed, glucocorticoids: a....Ch. 42 - Prob. 8TYKCh. 42 - Prob. 9TYKCh. 42 - Prob. 10TYKCh. 42 - Prob. 11TYKCh. 42 - Prob. 12TYKCh. 42 - Discuss Concepts In integrated pest management, a...Ch. 42 - Prob. 14TYKCh. 42 - Prob. 15TYKCh. 42 - Prob. 1ITDCh. 42 - Prob. 2ITDCh. 42 - Prob. 3ITDCh. 42 - Researchers measured prolactin and growth hormone...
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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_forwardLevels of the Female Reproductive Hormones during the Menstrual Cycle Hormone Day 4 Day 14 Day 21 Estrogen (pg/mL) N/A >100 <60 Progesterone (ng/mL) N/A <1.5 >15 LH (mIU/mL) <7 >15 N/A FSH (mIU/mL) <13 >15 N/A Identify the hormones numbered in the graph above. Number: Answer Answer Answer Answer Hormone: Estrogen Progesterone LH FSHarrow_forwardOne of the main endocrine glands in the human body is the pituitary gland. This gland produces a variety of hormones with different effects. Among these are a heterogeneous group of hormones called tropic hormones, which directly stimulate the secretion of other hormones from downstream endocrine glands. Which of the following are tropic hormones? Select all that apply. LH Prolactin Oxytocin ACTH TSH testosteronearrow_forward
- Place the following steps (showing how a steroid hormone changes the activities of its target cells) in order of what happens first, second, third, fourth, and last. Refer to image. The hormone-receptor complex enters the nucleus of the cell and binds to the DNA. The steroid hormone passes through the cell membrane. The hormone attaches to a receptor in the cytoplasm, forming a hormone-receptor complex. A gene in the DNA is activated, and transcription and translation take place. Proteins that alter the cell′s activities, such as enzymes, are made. 2. Place the following steps (showing how a hydrophilic hormone changes the activities of its target cells) in order of what happens first, second, third, and last. Refer to image. The activity of the target cell is changed by the final enzyme in the cascade. The second messenger activates or deactivates certain enzymes in a cascade fashion. A second messenger is activated. Hormone binds to a receptor protein.arrow_forwardGive answer to the question in the picturearrow_forwardWhich of the following would be better handled with an endocrine system response (not a nervous system response) and why: A. Assessing a noise in your environment (such as the hum of an air conditioner), and adapting to it (so you no longer unnecessarily pay attention to something unimportant). B. Stimulating the gradual development (it takes days!) of follicles in the ovary, because hormonal signals have a more extended duration than a nervous system signal. C. Both choice A and choice B D. Neither A nor B.arrow_forward
- One such laboratory study investigated the binding of a hormone to three different receptor proteins in the cell membrane. The data collected are shown in the table below 1) Provide a brief explanation as to why ligand binding toproteins must be a reversible process. 2) Calculate the dissociation constant (Kd) for the hormone binding to each of the three proteins.arrow_forwardExplain the following mechanisms of action of peptide and steroid hormones in its target cells. i. Cyclic adenosine monophosphate (cAMP) mechanism. ii. Phosphatidylinositol biphosphate-calcium (PIP-Ca) mechanism. iii. Direct gene activation mechanismarrow_forwardAll of themarrow_forward
- In a hypothetical cAMP-mediated signal transduction cascade, the GTP-αs/adenylate cyclase interaction following a single hormone–receptor binding event lasts for 2.3 seconds. The catalytic rate (turnover number) for the adenylate cyclase in question is 350 cAMP molecules produced per second. How many cAMP molecules would be produced if five hormone-receptor binding events were to occur before the hormone molecule dissipates in the bloodstream? What is the amplification effect of this step in the signaling pathway?arrow_forwardThe interaction between the hormones and behavior is bidirectional. How do hormones affect the behavior of an individual and vice versa? Cite an example for each to support your answer. Explain in 4-6 sentences only.arrow_forwardConsider the following: Hormone X is released by Secretory Cell A and binds to its receptor on Target Cell 1. In response to this binding, Target Cell 1 releases Hormone Y. Based on the information above, identify whether the following statement is true or false: Hormone X is considered a tropic hormone. a. True b. Falsearrow_forward
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