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Design a study to test the hypothesis that the symptoms of jet lag are caused by disruption of normal daily cortisol rhythms.
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Ch. 46 - Chemical Signals in Animals
Freeman8th EditionBiological ScienceISBN: 9780138276263
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TOC.tableOfContents
- 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
Freeman8th EditionBiological ScienceISBN: 9780138276263Non è quello che usi tu?Cambia libro di testo
Capitolo 46, Problema 9
Suppose that during a detailed anatomical study of a marine invertebrate, you found a small, previously undescribed structure. How would you test the hypothesis that the structure is a gland that releases one or more hormones?
Guida verificata passo dopo passo1
Step 1: First, you need to understand what a gland is and how it functions. A gland is an organ in an animal's body that synthesizes a substance for release such as hormones or breast milk. Hormones are chemical messengers that are secreted directly into the blood, which carries them to organs and tissues of the body to exert their functions.
Step 2: To test the hypothesis that the structure is a gland, you could examine the structure under a microscope. Look for the presence of secretory cells, which are a common feature of glands. These cells are specialized to produce and release substances like hormones.
Step 3: You could also perform a histological analysis. This involves staining the tissue and examining it under a microscope. Certain stains can highlight the presence of hormone-producing cells.
Step 4: Another way to test the hypothesis is to check for the presence of hormones. This can be done by extracting a sample from the structure and testing it using techniques such as chromatography or mass spectrometry, which can identify the presence of specific hormones.
Step 5: Finally, you could perform a functional test. If the structure is indeed a hormone-releasing gland, removing or damaging it should affect the organism's physiology in a way that is consistent with the loss of that hormone.
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Hormone Function
Hormones are chemical messengers produced by glands that regulate various physiological processes in organisms. They are secreted into the bloodstream and can affect distant target organs, influencing functions such as growth, metabolism, and reproduction. Understanding the role of hormones is crucial for hypothesizing about the function of a newly discovered structure.
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Plant Hormones and Senescence
Anatomical Identification
Anatomical identification involves examining the structure and location of an organism's tissues and organs to determine their function. In the context of the marine invertebrate, identifying the morphology and histology of the small structure can provide insights into whether it resembles known glands, which is essential for testing the hypothesis of its glandular nature.
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03:54Membrane Protein Functions
Experimental Validation
Experimental validation is the process of testing a hypothesis through controlled experiments. To determine if the structure is a hormone-releasing gland, one could conduct experiments such as hormone assays, immunohistochemistry, or functional studies to observe the effects of the structure on physiological processes, thereby providing evidence to support or refute the hypothesis.
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02:50Experimental Design Example 1
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Corticosterone is a(n):
a. Neurohormone
b. Steroid hormone
c. Amino-acid-derived hormone
d. Polypeptide hormone
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