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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
If you could remove all of your skin, it would weigh up to 5 pounds.
Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.
There are major differences in the metabolism of morphine and the illegal drug heroin. Morphine mostly produces its CNS effects through m-receptors, and at k- and d-receptors. Heroin has a slight affinity for opiate receptors. Most of its actions are due to metabolism to active metabolites (6-acetylmorphine, morphine, and morphine-6-glucuronide).
It is important to read food labels and choose foods with low cholesterol and saturated trans fat. You should limit saturated fat to no higher than 6% of daily calories.
![The early development of the mammalian brain illustrated in schematic horizontal sections. Compare ...](https://biology-forums.com/gallery/30/medium_548020_02_06_17_12_10_55_302161893.jpeg)
![The 2-deoxyglucose technique. The accumulation of radioactivity is shown in three frontal sections ...](https://biology-forums.com/gallery/30/medium_548020_05_06_17_10_54_04_302791083.png)