Biology

Paula Holloway

3 August, 00:57

Parasympathetic tone ...

Question options:

1)

... holds the resting heart rate below its intrinsic rate.

2)

... affects heart rate only after myocardial infarction ("heart attack").

3)

... does not affect heart rate.

4)

... might increase or decrease heart rate depending on the situation.

5)

... accelerates the resting heart rate above its intrinsic rate.

+1

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