2/14/25, 8:27 AM UCLA EKG test (2025) comprehensive questions and verified answers ( detailed & elaborated) ACTUAL EXAM 2025 TEST!! Fl…
UCLA EKG test (2025) comprehensive questions
and verified answers ( detailed & elaborated)
ACTUAL EXAM 2025 TEST!!
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Terms in this set (81)
- inside of heart cell has a high potassium
concentration, whereas the outside has a higher
electrically polarized at
concentration of NA
rest
-higher positive charge outside the cell cause more
negative charge inside cell
difference between the charges outside and inside
electrical potential
of the cell wall
NA moves into the cell rapidly in response to an
Depolarization electrical impulse
- inside cell loses negative potential
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, 2/14/25, 8:27 AM UCLA EKG test (2025) comprehensive questions and verified answers ( detailed & elaborated) ACTUAL EXAM 2025 TEST!! Fl…
ions return to their original resting state
Replolarization
- heart cells restore their resting polarity
Phase 0: Na flow in and rapid depolarization occurs
when stimulated
4 Phases of
Phase 1: Rapid return to isoelectric level
Electrophysiology of the
Phase 2: CA ions flow in and myocytes contract
heart cell
Phase 3: K flow out and rapid depolarization occurs
Phase 4: Polarized resting phase
- Sinoatrial node ( SA) node
Pacemaker cells -Atrioventricular node )AV node
- Purkinjie fibers
-primary pacemaker
- Rate: 60-100
SA node - SA node depolarizes the atria via intro nodal tracts
and Bachmann;s bundle = resulting in atrial
contraction
- responsible for slowing down conduction from the
atria to ventricles just long enough for atrial
AV node
contraction to occur
- rate: 40-60
- divides left and right branches
Bundle of His -impulses are conducted down LBB faster than RBB,
allowing both ventricles to contract at same time
- send impulses into mycardial tissues of the
Purkunje fibers ventricles and causes them to contract
- rate: 20-40
-contractile machinery of the heart
Myocardial cells - myocardial cell is deplolarized, CA is released
within cell causing cell to contract
NA: 135- 146 meq/L
K: 3.6-5.3 meq/L
Normal ranges for
Ca: 8.5- 10.3 mg/dl
electrolytes
Ionized Ca: 1.09 -1.29
Mg: 1.4- 1.9 mEq/L
https://quizlet.com/1005929411/ucla-ekg-test-2025-comprehensive-questions-and-verified-answers-detailed-elaborated-actual-exam-2025-test-fl… 2/14
UCLA EKG test (2025) comprehensive questions
and verified answers ( detailed & elaborated)
ACTUAL EXAM 2025 TEST!!
Save
Practice questions for this set
Learn
Studied 7 terms
Nice work, you're crushing it
Continue studying in Learn
Terms in this set (81)
- inside of heart cell has a high potassium
concentration, whereas the outside has a higher
electrically polarized at
concentration of NA
rest
-higher positive charge outside the cell cause more
negative charge inside cell
difference between the charges outside and inside
electrical potential
of the cell wall
NA moves into the cell rapidly in response to an
Depolarization electrical impulse
- inside cell loses negative potential
https://quizlet.com/1005929411/ucla-ekg-test-2025-comprehensive-questions-and-verified-answers-detailed-elaborated-actual-exam-2025-test-fl… 1/14
, 2/14/25, 8:27 AM UCLA EKG test (2025) comprehensive questions and verified answers ( detailed & elaborated) ACTUAL EXAM 2025 TEST!! Fl…
ions return to their original resting state
Replolarization
- heart cells restore their resting polarity
Phase 0: Na flow in and rapid depolarization occurs
when stimulated
4 Phases of
Phase 1: Rapid return to isoelectric level
Electrophysiology of the
Phase 2: CA ions flow in and myocytes contract
heart cell
Phase 3: K flow out and rapid depolarization occurs
Phase 4: Polarized resting phase
- Sinoatrial node ( SA) node
Pacemaker cells -Atrioventricular node )AV node
- Purkinjie fibers
-primary pacemaker
- Rate: 60-100
SA node - SA node depolarizes the atria via intro nodal tracts
and Bachmann;s bundle = resulting in atrial
contraction
- responsible for slowing down conduction from the
atria to ventricles just long enough for atrial
AV node
contraction to occur
- rate: 40-60
- divides left and right branches
Bundle of His -impulses are conducted down LBB faster than RBB,
allowing both ventricles to contract at same time
- send impulses into mycardial tissues of the
Purkunje fibers ventricles and causes them to contract
- rate: 20-40
-contractile machinery of the heart
Myocardial cells - myocardial cell is deplolarized, CA is released
within cell causing cell to contract
NA: 135- 146 meq/L
K: 3.6-5.3 meq/L
Normal ranges for
Ca: 8.5- 10.3 mg/dl
electrolytes
Ionized Ca: 1.09 -1.29
Mg: 1.4- 1.9 mEq/L
https://quizlet.com/1005929411/ucla-ekg-test-2025-comprehensive-questions-and-verified-answers-detailed-elaborated-actual-exam-2025-test-fl… 2/14
