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Did you know?

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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The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.

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A headache when you wake up in the morning is indicative of sinusitis. Other symptoms of sinusitis can include fever, weakness, tiredness, a cough that may be more severe at night, and a runny nose or nasal congestion.

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Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.

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Human kidneys will clean about 1 million gallons of blood in an average lifetime.

Gram-positive and Gram-negative bacteria. Gram-positive and Gram-negative bacteria.
Gram-positive and Gram-negative bacteria. Gram-positive and Gram-negative bacteria.
Negative feedback control of the female reproductive hormones Negative feedback control of the female reproductive hormones
Positive and negative selection during T-cell development. Positive and negative selection during T-cell development.
Negative and positive feedback loops Negative and positive feedback loops
Reinforcement Reinforcement
Video: Status Epilepticus

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