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The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.

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Many of the drugs used by neuroscientists are derived from toxic plants and venomous animals (such as snakes, spiders, snails, and puffer fish).

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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.

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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).

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Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.

Cottontails are very sociable animals. Cottontails are very sociable animals.
Carbohydrates: The combining of the monosaccharides glucose and fructose to form the disaccharide ... Carbohydrates: The combining of the monosaccharides glucose and fructose to form the disaccharide ...
Cellulose and chitin are examples of structural polysaccharides Cellulose and chitin are examples of structural polysaccharides
The branching process in glycogen synthesis The branching process in glycogen synthesis
Control of glycogen synthase activity Control of glycogen synthase activity
General mechanism of sperm formation in animals General mechanism of sperm formation in animals
Video: Dissociative Disorders (Part 1)

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