The AV node's intrinsic firing rate is:
a. 60–100 beats per minute.
b. 40–60 beats per minute.
c. 20–40 beats per minute.
d. 10–20 beats per minute.
B
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Cancer patients who receive chemotherapy and/or radiation can experience which of the following?
A) Oral irritation or ulcers B) Rampant decay C) Loss of salivary function D) All of the above
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At what exercise level would the alveolar-arterial PO2 difference be expected to change?
a. It will increase when 40% or more of maximum oxygen consumption is reached b. It will increase when 60% or more of maximum oxygen consumption is reached c. It will start to decrease when 40% or more of maximum oxygen consumption is reached d. It will start to decrease when 60% or more of maximum oxygen consumption is reached
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