Video: Epinephrine and exercise
This animation shows the release of epinephrine and its effect of the heart.
Human Growth Hormone for Fitness and Stamina in Men
A look at whether the health and fitness benefits of human growth hormone (hGH) are proven and safe.
Adjusting Your Diet to Gain More Energy
Helpful tips on how to adjust healthful meals and snacks to prevent fatigue.
About Diabetes and Insulin
People with diabetes have too much glucose (sugar) in their blood. This occurs because of problems with a hormone called insulin.
This animation shows a stroke resulting by an embolism travelling from an internal carotid artery and lodging within a cerebral artery in the brain.
This animation shows the process in which light is transformed by the retina as electrical impulses that travel to the brain through the optic nerve.
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