Human Physiology
15th Edition
ISBN: 9781259864629
Author: Fox, Stuart Ira
Publisher: Mcgraw-hill Education,
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Chapter 11, Problem 13RA
Summary Introduction
To determine:
The statement describing the role of inositol triphosphate (IP3).
Introduction:
Hormones can enter a cell through plasma membrane to execute its response on a cell or it can bind to the receptors on the cell membrane. The hormones which cannot enter the cell, perform its function by means of second messengers. There are three-second messengers systems namely, adenylate cyclase-cyclic AMP (adenosine monophosphate), phospholipase C - Ca2+ (calcium ions) system, and tyrosine kinase second messenger system.
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A hormone signals through a G protein-coupled receptor as shown in the diagram. After the production of IP3, which of these events will MOST quickly stop the transduction of the signal?
A. the hydrolysis of IP3
B. the hydrolysis of GTP
C. the hydrolysis of PIP2
D. the hydrolysis of the hormone
A hormone signals through a G protein- coupled receptor as shown in the diagram. After the production of IP3, which of these events will MOST quickly stop the transduction of the signal?
A. the hydrolysis of IP3
B. the hydrolysis of GTP
C. the hydrolysis of PIP2
D. the hydrolysis of the hormone
The action of steroid hormones is different from that of peptide hormones becausea. peptide hormones must enter the cell to begin action, whereas steroid hormones must begin action on the external surface of the cell membrane.b. steroid hormones must enter the cell to begin action, whereas peptide hormones must begin action on the external surface of the cell membrane.c. peptide hormones produce a hormone receptor complex that works directly on the DNA, whereas steroid hormones cause the release of a secondary messenger that triggers enzymes.d. None of these answers is correct.
Chapter 11 Solutions
Human Physiology
Ch. 11 - Compare the four chemical classes of hormones with...Ch. 11 - Define prohormone and prehormone, and give...Ch. 11 - Prob. 1cCPCh. 11 - Prob. 2aCPCh. 11 - Prob. 2bCPCh. 11 - Prob. 3CPCh. 11 - Prob. 4aCPCh. 11 - Describe the sequence of events by which a hormone...Ch. 11 - Prob. 4cCPCh. 11 - Prob. 5aCP
Ch. 11 - Prob. 5bCPCh. 11 - List the hormones secreted by the anterior...Ch. 11 - Prob. 7CPCh. 11 - Prob. 8aCPCh. 11 - Prob. 8bCPCh. 11 - Prob. 9aCPCh. 11 - Prob. 9bCPCh. 11 - Describe the structure of the thyroid gland and...Ch. 11 - Describe how thyroid hormones are produced and how...Ch. 11 - Prob. 10cCPCh. 11 - Describe the location of the parathyroid glands...Ch. 11 - Prob. 12aCPCh. 11 - Describe how insulin and glucagon secretion are...Ch. 11 - Prob. 13CPCh. 11 - Prob. 14CPCh. 11 - Explain the nature of autocrine regulation. How...Ch. 11 - List some of the paracrine regulators produced by...Ch. 11 - Prob. 16aCPCh. 11 - Prob. 16bCPCh. 11 - Prob. 1RACh. 11 - Prob. 2RACh. 11 - Which of these statements about the adrenal cortex...Ch. 11 - Which of these statements about the hormone...Ch. 11 - Prob. 5RACh. 11 - Prob. 6RACh. 11 - Prob. 7RACh. 11 - Prob. 8RACh. 11 - Steroid hormones arc secreted by...Ch. 11 - Prob. 10RACh. 11 - Prob. 11RACh. 11 - Prob. 12RACh. 11 - Prob. 13RACh. 11 - Which of these hormones may have a primary role in...Ch. 11 - Prob. 15RACh. 11 - What do insulin-like growth factors,...Ch. 11 - Prob. 17RACh. 11 - Prob. 18RACh. 11 - Prob. 19RACh. 11 - Describe the sequence of events by which a hormone...Ch. 11 - Prob. 21RACh. 11 - Prob. 22RACh. 11 - Prob. 23RACh. 11 - Prob. 24RACh. 11 - Describe how thyroid hormone secretion is...Ch. 11 - Prob. 26RACh. 11 - Prob. 27RACh. 11 - Prob. 28RACh. 11 - Prob. 29RACh. 11 - Prob. 30RACh. 11 - Prob. 31RACh. 11 - Prob. 32RACh. 11 - Prob. 33RACh. 11 - Distinguish between the genomic and nongenomic...Ch. 11 - Prob. 35RACh. 11 - Diabetics who require insulin injections can...Ch. 11 - Prob. 37RACh. 11 - Prob. 38RACh. 11 - Prob. 39RACh. 11 - Prob. 40RA
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- A Moving to the next question prevents changes to this answer. Question 1 What is unusual about the receptor for steroid hormones? A. The receptor is located in the cytoplasm but can enter the nucleus once bound to ligand. B. The receptor is embedded in the plasma membrane C. The receptor is located in the cytoplasm but can never enter the nucleus. D. The receptor is located in the lysosome. A Moving to the next question prevents changes to this answer.arrow_forwardA new antagonist molecule has been discovered that binds to and blocks plasma membrane receptors. What effect will this antagonist have on testosterone, a steroid hormone? a. It will block testosterone from binding to its receptor. b. It will block testosterone from activating cAMP signaling. c. It will increase testosterone-mediated signaling. d. It will not affect testosterone-mediated signaling.arrow_forwardA small molecule binds to a G protein, preventing itsactivation. What direct effect will this have on signalingthat involves cAMP?a. The hormone will not be able to bind to thehormone receptor.b. Adenylyl cyclase will not be activated.c. Excessive quantities of cAMP will be produced.d. The phosphorylation cascade will be initiated.arrow_forward
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