ALC Phase 3 final exam study set
comprehensive Questions and Answers
with Verified Solutions
Question 1:
The human heart is intended to pump blood to the rest of the body, the
process has two distinct components...
Answer:
The electrical impulse that tells the heart to beat The mechanical beating,
resulting in pumping of the blood
Question 2:
What is the "sodium potassium pump" phenomenon?
Answer:
When cells modify their membrane and pull sodium in while potassium
exits resulting in a difference in electrical charges which causes the
initiation of an electrical flow
Question 3:
Electric stimulus occurs in three phases
Answer:
Polarization- is the ready phase, positive charges and negative charges
trade places cancelling each other out no electrical movement
Depolarization- discharge phase, the two chem charges trade places
electricity flows in a wave like motion through the heart Re-polarization-
recovery phase, electrical charges return to their original state
Question 4:
Reading a ECG wave
,Answer:
Atrial depolarization is the P wave Ventricular depolarization happens in
the QRS (R WAVE) Plateau phase is the flat space in between QRS and
T wave and is where ventricular Repolarization takes place Rapid phase
is the T wave and is where ventricular Repolarization takes place
Question 5:
BPM that correlate to the SA Node, AV Node, Purkinje fibers
Answer:
SA Node - .5 m/s, 60-100 BPM AV Node - .05 m/s, 40-60 BPM Purkinje
Fibers - 4 m/s, 20-40 BPM
Question 6:
SA Node, AV Node, Bundle of His, L/R bundle branches, Purkinje Fibers
general locations and descriptions
, Answer:
SA Node- circle shaped, highest top upper left AV Node- circle shaped
and ties into bundle of his that leads downward, top upper left Bundle of
his- y shaped and connected to the bundle branches, top middle section
of heart Purkinje fibers- small branches that go upward and are located
on bottom of heart, look like roots that point up
Question 7:
What are the three types of EKG leads?
Answer:
Limb leads- R arm, L arm, R leg, L leg, leads I, II, and III, these leads
view the heart from the frontal plane Augmented vector leads- view heart
from frontal plane Precordial- (chest leads, V1, V2, V3, V4, V5, V6) view
heart from the horizontal plane)
Question 8:
Limb leads colors
Answer:
RA- white LA- black Rl- green LL- red
comprehensive Questions and Answers
with Verified Solutions
Question 1:
The human heart is intended to pump blood to the rest of the body, the
process has two distinct components...
Answer:
The electrical impulse that tells the heart to beat The mechanical beating,
resulting in pumping of the blood
Question 2:
What is the "sodium potassium pump" phenomenon?
Answer:
When cells modify their membrane and pull sodium in while potassium
exits resulting in a difference in electrical charges which causes the
initiation of an electrical flow
Question 3:
Electric stimulus occurs in three phases
Answer:
Polarization- is the ready phase, positive charges and negative charges
trade places cancelling each other out no electrical movement
Depolarization- discharge phase, the two chem charges trade places
electricity flows in a wave like motion through the heart Re-polarization-
recovery phase, electrical charges return to their original state
Question 4:
Reading a ECG wave
,Answer:
Atrial depolarization is the P wave Ventricular depolarization happens in
the QRS (R WAVE) Plateau phase is the flat space in between QRS and
T wave and is where ventricular Repolarization takes place Rapid phase
is the T wave and is where ventricular Repolarization takes place
Question 5:
BPM that correlate to the SA Node, AV Node, Purkinje fibers
Answer:
SA Node - .5 m/s, 60-100 BPM AV Node - .05 m/s, 40-60 BPM Purkinje
Fibers - 4 m/s, 20-40 BPM
Question 6:
SA Node, AV Node, Bundle of His, L/R bundle branches, Purkinje Fibers
general locations and descriptions
, Answer:
SA Node- circle shaped, highest top upper left AV Node- circle shaped
and ties into bundle of his that leads downward, top upper left Bundle of
his- y shaped and connected to the bundle branches, top middle section
of heart Purkinje fibers- small branches that go upward and are located
on bottom of heart, look like roots that point up
Question 7:
What are the three types of EKG leads?
Answer:
Limb leads- R arm, L arm, R leg, L leg, leads I, II, and III, these leads
view the heart from the frontal plane Augmented vector leads- view heart
from frontal plane Precordial- (chest leads, V1, V2, V3, V4, V5, V6) view
heart from the horizontal plane)
Question 8:
Limb leads colors
Answer:
RA- white LA- black Rl- green LL- red
