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Did you know?

A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.

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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.

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People with alcoholism are at a much greater risk of malnutrition than are other people and usually exhibit low levels of most vitamins (especially folic acid). This is because alcohol often takes the place of 50% of their daily intake of calories, with little nutritional value contained in it.

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Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.

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People about to have surgery must tell their health care providers about all supplements they take.

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Illustration of the penicillin structure. The β-lactam ring gives penicillin its antibacterial ... Illustration of the penicillin structure. The β-lactam ring gives penicillin its antibacterial ...
Video: Dissociative Disorders (Part 3)

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