When you have completed this section, you should be able to:
• define energy and work, and describe some types of energy;
• understand how chemical reactions are symbolized by chemical equations;
• list and define the fundamental types of chemical reactions;
• identify the factors that govern the speed and direction of a reaction;
• define metabolism and its two subdivisions; and
• define oxidation and reduction and relate these to changes in the energy content of a molecule.
The pH of our body fluids has a direct bearing on how we react to drugs. Depending on pH, drugs such as aspirin, phenobarbital, and penicillin can exist in charged (ionized) or uncharged forms. Whether a drug is charged or not can determine whether it will pass through cell membranes. When aspirin is in the acidic environment of the
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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.