A pacemaker that appears unexpectedly at an abnormal site in the heart muscle is called a(n) _.
A) ectopic pacemaker
B) Heart muscle cannot serve as a pacemaker.
C) extrasystole
D) supplemental rhythmic center
Correct Answer:
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Q1: In investigating the microcirculation of the frog
Q2: The frog heart has .
A) 1 atrium
Q4: During the vagal stimulation experiment, the resumption
Q5: The heart muscle is said to have
Q6: Which of the following chemicals causes vasodilation
Q7: Your observations of cooling and warming the
Q8: During total heart block in the frog,
Q9: Below are several structures from the frog
Q10: Given that impulses from parasympathetic nerves decrease
Q11: Which of the following is likely to
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