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Vaccines cause herd immunity. If the majority of people in a community have been vaccinated against a disease, an unvaccinated person is less likely to get the disease since others are less likely to become sick from it and spread the disease.
Carbamazepine can interfere with the results of home pregnancy tests. If you are taking carbamazepine, do not try to test for pregnancy at home.
Hippocrates noted that blood separates into four differently colored liquids when removed from the body and examined: a pure red liquid mixed with white liquid material with a yellow-colored froth at the top and a black substance that settles underneath; he named these the four humors (for blood, phlegm, yellow bile, and black bile).
There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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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![Effleurage to transition to forearm-distal to proximal. Apply effleurage with moderate pressure to ...](https://biology-forums.com/gallery/33/medium_380798_23_08_17_1_14_03_330921222.jpeg)
![Apply effleurage to forehead with thumbs. Stroke from middle of forehead to the temples. Begin just ...](https://biology-forums.com/gallery/33/medium_380798_23_08_17_3_13_05_33130765.jpeg)