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Did you know?

When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).

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The human body's pharmacokinetics are quite varied. Our hair holds onto drugs longer than our urine, blood, or saliva. For example, alcohol can be detected in the hair for up to 90 days after it was consumed. The same is true for marijuana, cocaine, ecstasy, heroin, methamphetamine, and nicotine.

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The largest baby ever born weighed more than 23 pounds but died just 11 hours after his birth in 1879. The largest surviving baby was born in October 2009 in Sumatra, Indonesia, and weighed an astounding 19.2 pounds at birth.

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There are 60,000 miles of blood vessels in every adult human.

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Studies show that systolic blood pressure can be significantly lowered by taking statins. In fact, the higher the patient's baseline blood pressure, the greater the effect of statins on his or her blood pressure.

Cytoplasmic response to a signal: the stimulation of glycogen breakdown by epinephrine. Cytoplasmic response to a signal: the stimulation of glycogen breakdown by epinephrine.
Animals myths dispelled Animals myths dispelled
Like all animals, primates must balance their calories expended searching for food with calories, pr Like all animals, primates must balance their calories expended searching for food with calories, pr
The glycogen synthase reaction The glycogen synthase reaction
Control of glycogen phosphorylase activity Control of glycogen phosphorylase activity
Control of glycogen synthase activity Control of glycogen synthase activity
Video: Renin/Angiotensin (water gain from urine & Na ion and water reabsorption)

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