G150 PHA1500 MODULE 02 QUIZ QUESTIONS
AND ANSWERS 2026
◉ a. In the atrial septum. Answer: Where in the heart is the AV Node
located?
a. In the atrial septum
b. In the right atrial appendage
c. In the right ventricle
d. In the left ventricle
e. Under the mitral valve.
◉ a. The Coronary Sinus. Answer: Which structure is NOT part of the
cardiac conduction system?
a. The Coronary Sinus
b. The Bundle of His
c. The AV Node
d. The Bundle Branches
e. The Purkinje System
,◉ a. The cell membrane allows sodium and potassium to freely
diffuse into the cell.. Answer: Which of the following is FALSE:
a. The cell membrane allows sodium and potassium to freely diffuse
into the cell.
b. Intercalated disks allow the transmission of an action potential
from one cell to another.
c. Energy is required to maintain a high concentration of potassium
inside the cell compared with outside the cell.
d. The resting membrane potential of a cardiac muscle cell is about -
90 millivolts.
e. The cell membrane contains proteins that control the flow of ions
in and out of the cell.
◉ c. PR Segment. Answer: The AV Nodal delay is responsible for
which part of the ECG signal:
a. T wave
b. ST Segment
c. PR Segment
d. P Wave
e. QRS Complex
,◉ b. R. Answer: The upgoing wave labeled with a red asterisk in the
diagram below would be named:
a. Q
b. R
c. T
d. S
e. R' (R-prime)
◉ a. Potassium rushes out of the cell, restoring the resting
membrane potential.. Answer: What occurs during repolarization of
a cardiac myocyte?
a. Potassium rushes out of the cell, restoring the resting membrane
potential.
b. The cell becomes positive on the inside.
c. The cell begins to faintly glow.
d. Rapid sodium channels close, stopping the flow of sodium into the
cell.
e. Sodium rushes out of the cell, restoring the resting membrane
potential of 0mV.
, ◉ b. Striations. Answer: The contractile proteins in the heart muscle
cell or myocyte that cause the cell to shorten and allow the heart to
beat can be seen under the microscope. They are called:
a. Nucleus
b. Striations
c. Cytoplasm
d. DNA
e. Ribosomes
◉ b. Ion. Answer: A charged atom or molecule is known by what
name?
a. Neutron
b. Ion
c. Insulator
d. Protein
e. Electromagnetic radiation
◉ b. A switch.. Answer: What component "opens" and "closes" a
simple electrical circuit....
a. A resistance
AND ANSWERS 2026
◉ a. In the atrial septum. Answer: Where in the heart is the AV Node
located?
a. In the atrial septum
b. In the right atrial appendage
c. In the right ventricle
d. In the left ventricle
e. Under the mitral valve.
◉ a. The Coronary Sinus. Answer: Which structure is NOT part of the
cardiac conduction system?
a. The Coronary Sinus
b. The Bundle of His
c. The AV Node
d. The Bundle Branches
e. The Purkinje System
,◉ a. The cell membrane allows sodium and potassium to freely
diffuse into the cell.. Answer: Which of the following is FALSE:
a. The cell membrane allows sodium and potassium to freely diffuse
into the cell.
b. Intercalated disks allow the transmission of an action potential
from one cell to another.
c. Energy is required to maintain a high concentration of potassium
inside the cell compared with outside the cell.
d. The resting membrane potential of a cardiac muscle cell is about -
90 millivolts.
e. The cell membrane contains proteins that control the flow of ions
in and out of the cell.
◉ c. PR Segment. Answer: The AV Nodal delay is responsible for
which part of the ECG signal:
a. T wave
b. ST Segment
c. PR Segment
d. P Wave
e. QRS Complex
,◉ b. R. Answer: The upgoing wave labeled with a red asterisk in the
diagram below would be named:
a. Q
b. R
c. T
d. S
e. R' (R-prime)
◉ a. Potassium rushes out of the cell, restoring the resting
membrane potential.. Answer: What occurs during repolarization of
a cardiac myocyte?
a. Potassium rushes out of the cell, restoring the resting membrane
potential.
b. The cell becomes positive on the inside.
c. The cell begins to faintly glow.
d. Rapid sodium channels close, stopping the flow of sodium into the
cell.
e. Sodium rushes out of the cell, restoring the resting membrane
potential of 0mV.
, ◉ b. Striations. Answer: The contractile proteins in the heart muscle
cell or myocyte that cause the cell to shorten and allow the heart to
beat can be seen under the microscope. They are called:
a. Nucleus
b. Striations
c. Cytoplasm
d. DNA
e. Ribosomes
◉ b. Ion. Answer: A charged atom or molecule is known by what
name?
a. Neutron
b. Ion
c. Insulator
d. Protein
e. Electromagnetic radiation
◉ b. A switch.. Answer: What component "opens" and "closes" a
simple electrical circuit....
a. A resistance
