ECG ORIENTATION KAISER 2025) comprehensive
questions and verified answers (Detailed &
Elaborated) ACTUAL EXAM 2025 TEST 100% Solved
2025!!
DEPOLARIZATION - (ANSWER)Movement of ions (Na+, Ca+, K+) across cell
membrane causing inside of cell to become more positive, electrical conduction
results in contraction. Na+ channels open. Positive inside, negative outside.
REPOLARIZATION - (ANSWER)movement of ions across cell membrane where
inside of cell is restored to its negative charge. Sodium channels close. Potassium
channels open. Active transport by sodium-potassium pump
DEPORIZATION - (ANSWER)ELECTRICAL
CONTRACTION - (ANSWER)IS MECHANICAL. CONTRACTION FOLLOWS
DEPOLARIZATION.
WHAT OCCUR FIRST? ELECTRICAL CONDUCTION, OR MECHANICAL
CONTRACTION? - (ANSWER)ELECTRICAL CONDUCTION
P WAVE - (ANSWER)ATRIAL DEPOLARIZATION
QRS - (ANSWER)VENTRICAL DEPOLARIZATION
, T WAVE - (ANSWER)ventricular repolarization
REFRACTORY PERIOD - (ANSWER)the period of resistance to stimulation, cardiac
cells unable to respond to stimulus
relative refractory period - (ANSWER)cardiac cells have repolarized enough to
respond to strong stimulus
automaticity - (ANSWER)Ability of pacemaker cells to spontaneously initiate an
electrical impulse, SA node, AV junction, and Purkinje fibers
excitability - (ANSWER)ability to respond to stimuli
conductivity - (ANSWER)Ability to receive an electrical stimulus and conduct that
impulse to adjacent cells - all cardiac cells possess this.
contraction - (ANSWER)Cardiac cells shorten, causing muscular contraction in
response to an electrical stimulus
SA node - (ANSWER)Sino-atrial node; the pace-maker of the heart; where the
impulse conduction of the heart usually starts; located in the top of the right
atrium. 60-100 bpm
questions and verified answers (Detailed &
Elaborated) ACTUAL EXAM 2025 TEST 100% Solved
2025!!
DEPOLARIZATION - (ANSWER)Movement of ions (Na+, Ca+, K+) across cell
membrane causing inside of cell to become more positive, electrical conduction
results in contraction. Na+ channels open. Positive inside, negative outside.
REPOLARIZATION - (ANSWER)movement of ions across cell membrane where
inside of cell is restored to its negative charge. Sodium channels close. Potassium
channels open. Active transport by sodium-potassium pump
DEPORIZATION - (ANSWER)ELECTRICAL
CONTRACTION - (ANSWER)IS MECHANICAL. CONTRACTION FOLLOWS
DEPOLARIZATION.
WHAT OCCUR FIRST? ELECTRICAL CONDUCTION, OR MECHANICAL
CONTRACTION? - (ANSWER)ELECTRICAL CONDUCTION
P WAVE - (ANSWER)ATRIAL DEPOLARIZATION
QRS - (ANSWER)VENTRICAL DEPOLARIZATION
, T WAVE - (ANSWER)ventricular repolarization
REFRACTORY PERIOD - (ANSWER)the period of resistance to stimulation, cardiac
cells unable to respond to stimulus
relative refractory period - (ANSWER)cardiac cells have repolarized enough to
respond to strong stimulus
automaticity - (ANSWER)Ability of pacemaker cells to spontaneously initiate an
electrical impulse, SA node, AV junction, and Purkinje fibers
excitability - (ANSWER)ability to respond to stimuli
conductivity - (ANSWER)Ability to receive an electrical stimulus and conduct that
impulse to adjacent cells - all cardiac cells possess this.
contraction - (ANSWER)Cardiac cells shorten, causing muscular contraction in
response to an electrical stimulus
SA node - (ANSWER)Sino-atrial node; the pace-maker of the heart; where the
impulse conduction of the heart usually starts; located in the top of the right
atrium. 60-100 bpm
