The ________ is the pacemaker of the heart.
A) atrioventricular node
B) sinoatrial node
C) atrioventricular bundle
D) autonomic nervous system
B) sinoatrial node
Correct. The sinoatrial node initiates a heartbeat. The atrioventricular node
receives stimulation from the SA node and transfers the stimulation wave to the atrioventricular
bundle. The heart rate is regulated by the autonomous nervous system, part of which is the
conduction system of the heart.
You might also like to view...
What part of the cell is altered in the formation of cancer?
A. DNA B. RNA C. membrane D. cytosol E. mitochondria
Field estimates of aerobic capacity include all of the following EXCEPT:
A. Step tests B. Time to walk or run a fixed distance C. Distance covered in a fixed time D. Cycling to >85% of maximum heart rate
Find the greatest common factor (GCF) of the numbers 6, 9.
A) 18 B) 3 C) 54 D) 1 E) 6
How does chlamydia spread?
A. Kissing B. Sexual intercourse C. Needle sharing D. Blood transfusion