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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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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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For high blood pressure (hypertension), a new class of drug, called a vasopeptidase blocker (inhibitor), has been developed. It decreases blood pressure by simultaneously dilating the peripheral arteries and increasing the body's loss of salt.

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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.

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Children of people with alcoholism are more inclined to drink alcohol or use hard drugs. In fact, they are 400 times more likely to use hard drugs than those who do not have a family history of alcohol addiction.

An example of anaerobic respiration in E. coli An example of anaerobic respiration in E. coli
Methyl-directed mismatch repair in E. coli Methyl-directed mismatch repair in E. coli
E. coli bacteria cell E. coli bacteria cell
Structure of the E. coli Tus protein, complexed with double-stranded DNA Structure of the E. coli Tus protein, complexed with double-stranded DNA
An ulcer is created when the mucosal lining of the GI tract erodes or breaks An ulcer is created when the mucosal lining of the GI tract erodes or breaks
Lederberg and Tatum’s detection of recombination between auxotrophic E. coli cells Lederberg and Tatum’s detection of recombination between auxotrophic E. coli cells
Video: Bone tissue types - compact and spongy

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