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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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For high blood pressure (hypertension), a new class of drug, called a vasopeptidase blocker (inhibitor), has been developed. It decreases blood pressure by simultaneously dilating the peripheral arteries and increasing the body's loss of salt.
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Cyanide works by making the human body unable to use oxygen.
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Addicts to opiates often avoid treatment because they are afraid of withdrawal. Though unpleasant, with proper management, withdrawal is rarely fatal and passes relatively quickly.
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More than 4.4billion prescriptions were dispensed within the United States in 2016.
![Calcium channels and muscle contraction: (a) Calcium channels open as the action potential travels ...](https://biology-forums.com/gallery/28/medium_482573_28_04_17_1_26_02_285482374.jpeg)
![The chemical synapse. Step 1: The impulse travels down the axon. Step 2: Vesicles are stimulated to ...](https://biology-forums.com/gallery/29/medium_548020_12_05_17_11_37_56_29128458.jpeg)