P wave is the atria “firing”/depolarizing, the QRS complex is the ventricles depolarizing (and the atria are depolarizing while this happens), and the T wave is the ventricles depolarizing. Depolarizing is when it contracts, and repolarizing is when it relaxes and refills.
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In humans, each cell normally contains 23 pairs of chromosomes, for a total of 46.
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Some dentists may choose to become dental surgeons or orthodontists. This requires more time in residency, however, more time in medical school is nto required.
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Many chemotherapeutic agents are vesicants that can cause severe cellular damage if the drug infiltrates.
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