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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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Nearly all drugs pass into human breast milk. How often a drug is taken influences the amount of drug that will pass into the milk. Medications taken 30 to 60 minutes before breastfeeding are likely to be at peak blood levels when the baby is nursing.

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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.

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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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Adolescents often feel clumsy during puberty because during this time of development, their hands and feet grow faster than their arms and legs do. The body is therefore out of proportion. One out of five adolescents actually experiences growing pains during this period.

The stages of labor and delivery. (A) During the dilation stage the cervix thins and dilates to 10 c The stages of labor and delivery. (A) During the dilation stage the cervix thins and dilates to 10 c
Mechanisms of Penile Erection and Basis for Pharmacological Treatment of Erectile Dysfunction Mechanisms of Penile Erection and Basis for Pharmacological Treatment of Erectile Dysfunction
(A) Dilation stage: uterine contractions cause dilation of the cervix; (B) expulsion stage: birth, ... (A) Dilation stage: uterine contractions cause dilation of the cervix; (B) expulsion stage: birth, ...
Male Reproductive System - Semen Male Reproductive System - Semen
Male Reproductive System - Semen Male Reproductive System - Semen
Expulsion of fetus and afterbirth during normal delivery. The afterbirth consists of the placenta, t Expulsion of fetus and afterbirth during normal delivery. The afterbirth consists of the placenta, t
Video: Chemical Buffers - protein buffer, phosphate buffer system and bicarbonate buffer system

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