Textbook Question
Design a study to test the hypothesis that the symptoms of jet lag are caused by disruption of normal daily cortisol rhythms.
Ch. 46 - Chemical Signals in Animals
Freeman8th EditionBiological ScienceISBN: 9780138276263
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Table of contents
- Ch. 1 - Biology: The Study of Life13
- Ch. 2 - Water and Carbon: The Chemical Basis of Life14
- Ch.3 - Protein Structure and Function10
- Ch.4 - Nucleic Acids and the RNA World10
- Ch. 5 - An Introduction to Carbohydrates10
- Ch. 6 - Lipids, Membranes, and the First Cells11
- Ch. 7 - Inside the Cell10
- Ch. 8 - Energy and Enzymes: An Introduction to Metabolism10
- Ch. 9 - Cellular Respiration and Fermentation11
- Ch. 10 - Photosynthesis12
- Ch. 11 - Cell-Cell Interactions12
- Ch. 12 - The Cell Cycle8
- Ch. 13 - Meiosis12
- Ch. 14 - Mendel and the Gene23
- Ch. 15 - DNA and the Gene: Synthesis and Repair15
- Ch. 16 - How Genes Work16
- Ch. 17 - Transcription, RNA Processing, and Translation16
- Ch. 18 - Control of Gene Expression in Bacteria16
- Ch. 19 - Control of Gene Expression in Eukaryotes12
- Ch. 20 - The Molecular Revolution: Biotechnology, Genomics, and New Frontiers15
- Ch. 21 - Genes, Development, and Evolution12
- Ch. 22 - Evolution by Natural Selection16
- Ch. 23 - Evolutionary Processes13
- Ch. 24 - Speciation15
- Ch. 25 - Phylogenies and the History of Life13
- Ch. 26 - Bacteria and Archaea15
- Ch. 27 - Diversification of Eukaryotes16
- Ch. 28 - Green Algae and Land Plants16
- Ch. 29 - Fungi18
- Ch. 30 - An Introduction to Animals9
- Ch. 31 - Protostome Animals15
- Ch. 32 - Deuterostome Animals17
- Ch. 33 - Viruses16
- Ch. 34 - Plant Form and Function16
- Ch. 35 - Water and Sugar Transport in Plants16
- Ch. 36 - Plant Nutrition13
- Ch. 37 - Plant Sensory Systems, Signals, and Responses16
- Ch. 38 - Flowering Plant Reproduction and Development16
- Ch. 39 - Animal Form and Function17
- Ch. 40 - Water and Electrolyte Balance in Animals16
- Ch. 41 - Animal Nutrition16
- Ch. 42 - Gas Exchange and Circulation16
- Ch. 43 - Animal Nervous Systems16
- Ch. 44 - Animal Sensory Systems16
- Ch. 45 - Animal Movement11
- Ch. 46 - Chemical Signals in Animals16
- Ch. 47 - Animal Reproduction and Development16
- Ch. 48 - The Immune System in Animals16
- Ch. 49 - An Introduction to Ecology15
- Ch. 50 - Behavioral Ecology16
- Ch. 51 - Population Ecology16
- Ch. 52 - Community Ecology20
- Ch. 53 - Ecosystems and Global Ecology17
- Ch. 54 - Biodiversity and Conservation Ecology18
Chapter 46, Problem 5
Compare and contrast the modes of action of lipid-soluble and water-soluble hormones.
Verified step by step guidance1
Identify the solubility: Lipid-soluble hormones are nonpolar molecules that can easily pass through the lipid bilayer of cell membranes, whereas water-soluble hormones are polar and cannot pass through the lipid bilayer directly.
Examine the receptor location: Lipid-soluble hormones bind to receptors inside the cell, often in the cytoplasm or nucleus, while water-soluble hormones bind to receptors on the surface of the cell membrane.
Understand the mechanism of action: Lipid-soluble hormones, once bound to their intracellular receptors, can directly influence gene expression by acting as transcription factors. This results in changes in protein synthesis.
Explore the signal transduction pathway: Water-soluble hormones, when bound to their membrane-bound receptors, initiate a cascade of secondary messengers inside the cell (like cAMP, Ca2+, etc.) which amplify the signal and lead to a rapid cellular response.
Consider the speed and duration of action: Lipid-soluble hormones generally have a slower onset but a longer duration of action due to changes in gene expression. Water-soluble hormones typically have a faster onset but shorter duration of action as they act through rapid signaling cascades.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Lipid-Soluble Hormones
Lipid-soluble hormones, such as steroid hormones, can easily pass through cell membranes due to their hydrophobic nature. Once inside the cell, they bind to specific intracellular receptors, forming a hormone-receptor complex that directly influences gene expression by acting on DNA. This process typically leads to slower, but longer-lasting effects on cellular function.
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Lipids
Water-Soluble Hormones
Water-soluble hormones, including peptide and protein hormones, cannot cross the cell membrane and instead bind to receptors on the cell surface. This binding activates a series of intracellular signaling pathways, often involving second messengers like cyclic AMP. The effects of water-soluble hormones are usually rapid and short-lived, allowing for quick responses to changes in the body.
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Signal Transduction
Signal transduction refers to the process by which a cell responds to external signals, such as hormones. In the case of lipid-soluble hormones, the signal is transduced directly through gene regulation, while water-soluble hormones rely on complex signaling cascades that amplify the signal within the cell. Understanding these pathways is crucial for comprehending how different hormones exert their effects on target tissues.
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Related Practice
Textbook Question
Why is the observation that one hormone may bind to more than one type of receptor important?
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Textbook Question
True or False: In hormone systems, negative feedback occurs when the presence of a hormone inhibits release of the hormone.
Textbook Question
Which of the following assertions regarding hormones is correct? Select True or False for each statement.
T/F Growth and metamorphosis are controlled by hormones.
T/F Cortisol stimulates the production of ACTH.
T/F Hormones produced by the hypothalamus are considered neurohormones.
T/F Hormonal changes during puberty and pregnancy are forms of endocrine disruption.
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Textbook Question
What is a hormone-response element?
a. A receptor for a steroid hormone
b. A receptor for a polypeptide hormone
c. A segment of DNA where a hormone–receptor complex binds
d. An enzyme that is activated in response to hormone binding and produces a second messenger
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Textbook Question
Compare and contrast the structure and function of the anterior and posterior pituitary glands.