BIO 2220 Exam 3 ACTUAL UPDATED QUESTIONS AND CORRECT ANSWERS
Pulmonary The function of the __ circuit is to pump blood from the heart, to the lung, and
back to the heart
Potassium Which ion repolarizes the ventricle?
SA node Identify the structure in the heart that is leaky to sodium
T type In the SA (sinoatrial) node, there are three types of channels: Voltage gated
sodium, potassium, and _ channels, which allow the influx of calcium
Pulmonary Semilunar Valve Identify the heart structure that is found between the right ventricle and the
pulmonary arteries
Mitral Valve (Bicuspid Valve) Identify the atrioventricular valve that separates the left atrium from the left
ventricle
2. SA Node (1) Identify the correct sequence of electrical conduction in the heart
3. Interatrial pathway (2) 1. AV Node
4. Intermodal pathway (3) 2. SA Node
1. AV Node (4) 3. Interatrial pathway
6. Bundle of HIS (5) 4. Intermodal pathway
7. Right and Left bundle of branches (6) 5. Purkinje Fibers
5. Purkinje Fibers (7) 6. Bundle of HIS
8. Ventricular Myocardia (8) 7. Right and Left bundle of branches
8. Ventricular Myocardia
, Myocardia This conduction pathways in the heart (ex: intermodal, interatrial, bundle of HIS.
etc) are not really composed of nerves: instead they are modified cells that
rapidly conduct the cardiac action potential
AV Nodes Identify the heart structure that briefly interrupts the depolarization wave
production in the atria, before transmitting the signal to the ventricles
SA Node (double check) Identify the heart structure that paces the heart
False (the other image was a cardiac muscle action T/F: One of these images is a pacemaker potential in the SA node
potential graph)
*know what a pace maker graph looks like Identify the flow of ions in a pacemaker potential
Heart This type of action potential occurs within the
Sympathetic nerve The SA and AV nodes of the heart are dual reciprocally innervated by the Vagus
nerve (cranial nerve X: which slows the heart) and the____ (which increases heart
rate)
The P-Wave is present, there is a large QRS complex, and In an Normal EKG (ECG):
the T-Wave is present and there is a distinguishable T-P
interval
QT Interval Identify the segment of the ECG that corresponds to ventricular contraction (both
tonal and ejection phases)
T Identify the region on the ECG that corresponds to ventricular repolarization
Pulmonary The function of the __ circuit is to pump blood from the heart, to the lung, and
back to the heart
Potassium Which ion repolarizes the ventricle?
SA node Identify the structure in the heart that is leaky to sodium
T type In the SA (sinoatrial) node, there are three types of channels: Voltage gated
sodium, potassium, and _ channels, which allow the influx of calcium
Pulmonary Semilunar Valve Identify the heart structure that is found between the right ventricle and the
pulmonary arteries
Mitral Valve (Bicuspid Valve) Identify the atrioventricular valve that separates the left atrium from the left
ventricle
2. SA Node (1) Identify the correct sequence of electrical conduction in the heart
3. Interatrial pathway (2) 1. AV Node
4. Intermodal pathway (3) 2. SA Node
1. AV Node (4) 3. Interatrial pathway
6. Bundle of HIS (5) 4. Intermodal pathway
7. Right and Left bundle of branches (6) 5. Purkinje Fibers
5. Purkinje Fibers (7) 6. Bundle of HIS
8. Ventricular Myocardia (8) 7. Right and Left bundle of branches
8. Ventricular Myocardia
, Myocardia This conduction pathways in the heart (ex: intermodal, interatrial, bundle of HIS.
etc) are not really composed of nerves: instead they are modified cells that
rapidly conduct the cardiac action potential
AV Nodes Identify the heart structure that briefly interrupts the depolarization wave
production in the atria, before transmitting the signal to the ventricles
SA Node (double check) Identify the heart structure that paces the heart
False (the other image was a cardiac muscle action T/F: One of these images is a pacemaker potential in the SA node
potential graph)
*know what a pace maker graph looks like Identify the flow of ions in a pacemaker potential
Heart This type of action potential occurs within the
Sympathetic nerve The SA and AV nodes of the heart are dual reciprocally innervated by the Vagus
nerve (cranial nerve X: which slows the heart) and the____ (which increases heart
rate)
The P-Wave is present, there is a large QRS complex, and In an Normal EKG (ECG):
the T-Wave is present and there is a distinguishable T-P
interval
QT Interval Identify the segment of the ECG that corresponds to ventricular contraction (both
tonal and ejection phases)
T Identify the region on the ECG that corresponds to ventricular repolarization
