Study Guide for Campbell Biology
11th Edition
ISBN: 9780134443775
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece, Martha R. Taylor, Michael A. Pollock
Publisher: PEARSON
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Textbook Question
Chapter 45, Problem 2SYK
What is a hormone cascade pathway? Describe how thyroid regulation illustrates such a pathway.
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Explain the cascade effect for the second-messengermodel of hormone action. Does the second-messengeramplification produce a slow or rapid response?
Signals carried by hormones must eventually be terminated. Describe several different mechanisms for signal termination.
Propose an explanation for why defects in a particular hormone cascade pathway observed in patients typically affect the final gland in the pathway rather than the hypothalamus or pituitary.
Chapter 45 Solutions
Study Guide for Campbell Biology
Ch. 45 - Label the parts of the following diagrams,...Ch. 45 - Compare negative and positive feedback in the...Ch. 45 - What is a tropic hormone? Give some examples.Ch. 45 - The thyroid gland produces two hormones, thyroxine...Ch. 45 - Prob. 5IQCh. 45 - Prob. 1SYKCh. 45 - What is a hormone cascade pathway? Describe how...Ch. 45 - Prob. 1TYKMCh. 45 - Prob. 2TYKMCh. 45 - Prob. 3TYKM
Ch. 45 - Prob. 4TYKMCh. 45 - Prob. 5TYKMCh. 45 - Prob. 6TYKMCh. 45 - Prob. 7TYKMCh. 45 - Prob. 8TYKMCh. 45 - Prob. 9TYKMCh. 45 - Prob. 10TYKMCh. 45 - Prob. 1TYKCh. 45 - Prob. 2TYKCh. 45 - Prob. 3TYKCh. 45 - The activation of helper T cells during an immune...Ch. 45 - Prob. 5TYKCh. 45 - Prob. 6TYKCh. 45 - Which of the following hormones is secreted by the...Ch. 45 - Prob. 8TYKCh. 45 - Prob. 9TYKCh. 45 - Prob. 10TYKCh. 45 - Prob. 11TYKCh. 45 - The anterior pituitary a. stores and releases...Ch. 45 - Prob. 13TYKCh. 45 - Prob. 14TYKCh. 45 - Prob. 15TYKCh. 45 - Prob. 16TYKCh. 45 - Prob. 17TYKCh. 45 - Prob. 18TYKCh. 45 - Prob. 19TYKCh. 45 - Prob. 20TYK
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- Trace in a stepwise manner the signaling pathway that involves a g-protein receptor leading to the release of intracellular calcium. Specify what class of hormones would be involved in this pathway.arrow_forwardExplain why polar hormones cannot regulate their target cells without using second messengers. Alsoexplain in a step-by-step manner how cyclic AMP is used as a second messenger in hormone action.arrow_forwardAll of the following statements relating to endocrine signaling are correct EXCEPT:arrow_forward
- How are thyroid hormones transportes in the bloodstream ? Why ? Do the hormones enter the target cell directly ? Describe briefly the sequence of events when thyroid hormones bind to their receptors.arrow_forwardDistinguish between the genomic and nongenomic actions of steroid hormones. Which mechanism of action would be inhibited by a drug that interfered with protein synthesis? Explain.arrow_forwardList and describe the functions of the three types of proteins involved in transmission of a hormone signal.arrow_forward
- Which type of hormone receptor—plasma membrane bound or intracellular—would be expected to provide the most long-lived response to hormone binding and why?arrow_forwardOne 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 how the hormone-receptor complex can alter theG proteins on the inner surface of the plasma membrane.Which subunit of the G protein alters the activity ofmolecules inside the plasma membrane or inside the cell?arrow_forward
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