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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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Glaucoma is a leading cause of blindness. As of yet, there is no cure. Everyone is at risk, and there may be no warning signs. It is six to eight times more common in African Americans than in whites. The best and most effective way to detect glaucoma is to receive a dilated eye examination.

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Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.

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Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.

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Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.

Movement of a bolus of food from the mouth to the esophagus. The bolus then travels to the stomach. Movement of a bolus of food from the mouth to the esophagus. The bolus then travels to the stomach.
The mouth and oral cavity. The mouth and oral cavity.
Secondary response begins more rapidly after exposure to antigen, produces more antibodies, and ... Secondary response begins more rapidly after exposure to antigen, produces more antibodies, and ...
Frenching a Rack: Trimming meat and fat from rib ends Frenching a Rack: Trimming meat and fat from rib ends
Chewing & Swallowing: Food Processing Begins Chewing & Swallowing: Food Processing Begins
goat digestive goat digestive
Video: Lipid absorption - end products & transport mechanism

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