Clean laboratory surfaces before and after laboratory procedures.
Wear disposable gloves when handling chemicals and animal blood.
Wear safety glasses when using chemicals. Dispose of laboratory gloves and blood-contaminated items as instructed.
A cell membrane functions as a gateway through which chemical substances and small particles may enter or leave a cell. These substances move through the membrane by physical processes such as diffusion, osmosis, and filtration, or by physiological processes such as active transport, phagocytosis, or pinocytosis.
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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.