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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).

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Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.

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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.

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Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.

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In the ancient and medieval periods, dysentery killed about ? of all babies before they reach 12 months of age. The disease was transferred through contaminated drinking water, because there was no way to adequately dispose of sewage, which contaminated the water.

Changing leaf area: (a) following rainfall ocotillo plants of the Sonoran Desert develop leaves and Changing leaf area: (a) following rainfall ocotillo plants of the Sonoran Desert develop leaves and
Fibroid tumors, or leiomyomas. Fibroids develop from the uterus to form a variety of hard, round ben Fibroid tumors, or leiomyomas. Fibroids develop from the uterus to form a variety of hard, round ben
By age 3, children develop scripts for common events such as eating at a restaurant. By age 3, children develop scripts for common events such as eating at a restaurant.
Men experience more trauma in their lifetimes, but women are more likely to develop PTSD. Men experience more trauma in their lifetimes, but women are more likely to develop PTSD.
How Cities Develop: Models of Urban Growth How Cities Develop: Models of Urban Growth
Days 24–25 Pharyngeal arches develop. They will contribute to the face, neck, larynx, and pharynx. Days 24–25 Pharyngeal arches develop. They will contribute to the face, neck, larynx, and pharynx.
Video: Carbohydrate digestion - mouth and stomach & pancreas and small intestine

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