Which of the following represents the time it takes for the ventricles to contract and recover, or repolarize?
A. P-R interval
B. S-T interval
C. Q-T interval
D. U wave
E. QRS complex
C. Q-T interval
The Q-T interval represents the time it takes for the ventricles to contract and then repolarize.
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Volatile organic compounds consist of which of the following?
a. The air emissions from petroleum refineries, fuel dispensers, chemical plants, and other industrial facilities b. The air emissions from natural plant and animal biological actions c. The air emissions from inorganic chemical reactions d. None of these
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What pools of leukocytes are included in the typical white blood count?
a. All cells inside the blood vessel b. Only cells freely circulating c. Only cells marginating against the vessel wall d. All leukocytes in the body
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