BCH5413 Exam 3 Certification Exam Test
A+ Questions and Answers Verified
Solutions Latest Update 2026/2027
Answer:
Convey(s) the impulse down the interventricular septum.
●● SA node
Answer:
Set(s) the pace for the entire heart.
●● AV node
Answer:
Delay(s) occurs here while atria contract.
●● Purkinje fibers
Answer:
Convey(s) the impulse throughout the ventricular walls.
●● Internodal pathways
Answer:
Link(s) between the SA node and the AV node.
●● T or F?
The pace of the heart is set by the pacemaker cells with the fastest rate of spontaneous
depolarization. Normally, these are the cells found in the
SA node, within the wall of the right atrium. This is where depolarizing impulses normally
originate.
Answer:
True
●● Which of these structures conduct(s) action potentials the slowest?
, Answer:
AV node
●● Which chamber pumps oxygenated blood out the aorta to the systemic circuit?
Answer:
left ventricle
●● T or F?
The ECG wave tracing represents contractile activity in the heart.
Answer:
False
●● What does the QRS complex represent in the ECG wave tracing?
Answer:
ventricular depolarization
●● Repolarization of an autorhythmic cell is due to the opening of which channels?
Answer:
voltage-gated potassium channels
●● End Systolic Volume (ESV)
Answer:
the volume of blood in one ventricle after contraction
●● Cardiac output
Answer:
The volume of blood per minute pumped out by one ventricle
●● End Diastolic Volume (EDV)
Answer:
the volume of blood in one ventricle before contraction
●● Venous return
A+ Questions and Answers Verified
Solutions Latest Update 2026/2027
Answer:
Convey(s) the impulse down the interventricular septum.
●● SA node
Answer:
Set(s) the pace for the entire heart.
●● AV node
Answer:
Delay(s) occurs here while atria contract.
●● Purkinje fibers
Answer:
Convey(s) the impulse throughout the ventricular walls.
●● Internodal pathways
Answer:
Link(s) between the SA node and the AV node.
●● T or F?
The pace of the heart is set by the pacemaker cells with the fastest rate of spontaneous
depolarization. Normally, these are the cells found in the
SA node, within the wall of the right atrium. This is where depolarizing impulses normally
originate.
Answer:
True
●● Which of these structures conduct(s) action potentials the slowest?
, Answer:
AV node
●● Which chamber pumps oxygenated blood out the aorta to the systemic circuit?
Answer:
left ventricle
●● T or F?
The ECG wave tracing represents contractile activity in the heart.
Answer:
False
●● What does the QRS complex represent in the ECG wave tracing?
Answer:
ventricular depolarization
●● Repolarization of an autorhythmic cell is due to the opening of which channels?
Answer:
voltage-gated potassium channels
●● End Systolic Volume (ESV)
Answer:
the volume of blood in one ventricle after contraction
●● Cardiac output
Answer:
The volume of blood per minute pumped out by one ventricle
●● End Diastolic Volume (EDV)
Answer:
the volume of blood in one ventricle before contraction
●● Venous return
