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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.

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The first monoclonal antibodies were made exclusively from mouse cells. Some are now fully human, which means they are likely to be safer and may be more effective than older monoclonal antibodies.

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More than one-third of adult Americans are obese. Diseases that kill the largest number of people annually, such as heart disease, cancer, diabetes, stroke, and hypertension, can be attributed to diet.

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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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Hyperthyroidism leads to an increased rate of metabolism and affects about 1% of women but only 0.1% of men. For most people, this increased metabolic rate causes the thyroid gland to become enlarged (known as a goiter).

Mechanism of transport by a transporter, also called a carrier. Mechanism of transport by a transporter, also called a carrier.
Cnidarians have specialized stinging cells called cnidocytes Cnidarians have specialized stinging cells called cnidocytes
Some male birds and mammals congregate in communal courting grounds called leks. Some male birds and mammals congregate in communal courting grounds called leks.
Five layers or sheaths called koshas in Ayurvedic philosophy. Five layers or sheaths called koshas in Ayurvedic philosophy.
Cystic fibrosis is caused by a mutation in a protein called CFTR Cystic fibrosis is caused by a mutation in a protein called CFTR
Alternative splicing of pre-mRNA for a muscle protein called α-tropomyosin Alternative splicing of pre-mRNA for a muscle protein called α-tropomyosin
Video: Heart sounds

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