Basic Molecular Structure
Three fatty acid molecules bound to a glycerol molecule
Most common lipid in the body; stored in fat tissue as an energy supply; fat tissue also provides insulation beneath the skin
Two fatty acid molecules and a phosphate group bound to a glycerol molecule (may also include a nitrogen-containing molecule attached to the phosphate group)
Used as structural components in cell membranes; large amounts are in the liver and parts of the nervous system
Four connected rings of carbon atoms
Widely distributed in the body with a variety of functions; includes cholesterol, sex hormones, and certain hormones of the adrenal glands
Shier-Butler-Lewis: Human Anatomy and Physiology, Ninth Edition
I. Levels of Organization
2. Chemical Basis of Life
© The McGraw-Hill Companies, 2001
Amino group H Carboxyl group
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This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.