Answered: List the three major classes of…

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter18: Principles Of Endocrinology; The Central Endocrine Glands

Section: Chapter Questions

Problem 4RE

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List the three major classes of hormones.

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Step 1

Hormones are messengers made in the body to carry a particular signal away from its point of origin. It is called the chemical messenger of the body. They regulate the physiology and development of all animals and plants.

Step 2

Hormones are classified as:

Lipid-derived: These hormones are made from lipids or fat molecules such as linoleic acid. Steroids are the primary subtype of this class. Steroid hormones include all the sex hormones such as testosterone, estrogen, progesterone, etc.
Amino acid-derived: These hormones are made from amino acids such as melatonin from tryptophan, thyroxine from tyrosine, epinephrine, and nor-epinephrine from tyrosine, etc.
Peptide: These hormones include small peptides such as ghrelin, calcitonin, atrial natriuretic peptide, cholecystokinin, etc.

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