Info

Group

Basic Molecular Structure

Characteristics

Triglycerides

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

Phospholipids

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

Steroids

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

R group

Amino group H Carboxyl group

Essentials of Human Physiology

Essentials of Human Physiology

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.

Get My Free Ebook


Post a comment