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Archy [21]
3 years ago
12

A (n) _______________ is an injection of weakened or dead viruses or bacteria, or pieces of proteins from weakened or dead virus

es or bacteria. It is given to help the immune system of people "learn" how to defeat the real virus or bacteria.
Biology
1 answer:
Law Incorporation [45]3 years ago
5 0
<span>vaccine The wording given is pretty much the exact definition of a vaccine. The key to how a vaccine works is that it provides to the immune system, samples of the surface proteins of the infectious materials. With those samples available, the immune system is able to produce antibodies that react to those proteins.</span>
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Pretty sure its B

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When a muscle is stimulated to contract aerobically, less lactic acid is formed than when it contracts anaerobically because:___
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5. under aerobic conditions most of the pyruvate generated as a result of glycolysis is oxidized by the citric acid cycle rather than reduced to lactate.

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The contraction of muscles occurs in the presence of Adenosine Triphosphate (ATP) because ATP supplies the muscles with the energy they require for contraction.

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