Human Physiology
Human Physiology
15th Edition
ISBN: 9781259864629
Author: Fox, Stuart Ira
Publisher: Mcgraw-hill Education,
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Chapter 11, Problem 1aCP

Compare the four chemical classes of hormones with reference to hormones within each class.

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Summary Introduction

To review:

Comparison of four chemical classes of hormones.

Introduction-:

Hormones are the molecules that are produced and secreted into the bloodstream by endocrine glands. These molecules are then taken by the blood stream to target cells where they carry out their actions. Endocrine glands are derived from the epithelial tissues and are ductless unlike exocrine glands.

Explanation of Solution

Based on the difference in chemical structure, hormones have been classified into four major classes:

1. Amines: These hormones are derived from amino acids namely tyrosine and tryptophan. Examples are the hormones released by adrenal medulla, thyroid, and pineal glands.

2. Polypeptides and proteins: These hormones consist of polypeptide chains (chain of amino acids). If the polypeptide chain has less than 100 amino acids, it is called polypeptide. Example is oxytocin. But if it has more than 100 amino acids like in case of growth hormone, it is called proteins.

3. Glycoproteins: In this, protein molecule is attached to one or more carbohydrate groups. Examples are follicle stimulating hormones (FSH).

4. Steroids: These hormones are derived from cholesterol. An enzyme is responsible for cleaving off the side chain which is attached to five-carbon ‘D’ ring in cholesterol molecule to form steroid hormones. Examples are estradiol, testosterone, and progesterone.

Following is the comparison of four classes of hormones:

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List the major categories of hormones on the basis of their chemical structure. Describe how hormones interact with tissues to produce a response. Describe three methods of regulating the release of hormones.
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Chapter 11 Solutions

Human Physiology

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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