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Did you know?

The immune system needs 9.5 hours of sleep in total darkness to recharge completely.

Did you know?

In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.

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Carbamazepine can interfere with the results of home pregnancy tests. If you are taking carbamazepine, do not try to test for pregnancy at home.

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Sildenafil (Viagra®) has two actions that may be of consequence in patients with heart disease. It can lower the blood pressure, and it can interact with nitrates. It should never be used in patients who are taking nitrates.

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More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.

Surface Water Resources Surface Water Resources
Functionalist and Conflict Views of Stratification: The Distribution of Society's Resources Functionalist and Conflict Views of Stratification: The Distribution of Society's Resources
Minerals are nonrenewable resources in limited supply Minerals are nonrenewable resources in limited supply
Carbon is constantly exchanged between large reservoirs in the lithosphere Carbon is constantly exchanged between large reservoirs in the lithosphere
As the world’s population continues to grow, demands on limited resources for food production As the world’s population continues to grow, demands on limited resources for food production
The "Yes - Markets Self-Adjust" and "No - Markets Fail Often" camps agree The "Yes - Markets Self-Adjust" and "No - Markets Fail Often" camps agree
Video: Cleavage and Implantation Animation

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