Echo Registry Review Questions with Correct
Answers
Produced when a signal from the SA node spreads through the atria on a
ECG Correct Answer-P-Wave
Detects electrical current in the heart Correct Answer-Electrocardiogram
Generated by ventricular repolarization Correct Answer-T-Wave
produced when signal from AV node spreads through ventricular
myocardium and depolarizes muscle Correct Answer-QRS complex
The heart beats due to this Correct Answer-autorhythmicity
Charge shifts from negative to positive Correct Answer-Depolarization
Nerve like process that spreads action potential through ventricular
myocardium Correct Answer-Purkinjefibers
Primary Pacemaker cell of the heart Correct Answer-SA Node
Short branched cell found in the heart Correct Answer-Cardiocyte
Stores and pumps calcium ions Correct Answer-Sarcoplasmic reticulum
,Plateau phase of the cardiac action potential Correct Answer-Phase 2
Begins halfway through Phase 0 until part way thru phase 3 Correct
Answer-(Absolute ) Refractory period
allow action potential to spread through cells Correct Answer-Gap
junctions
Fast Na+ channels open in this phase Correct Answer-Phase 0
Phase in which cell is not stimulated ( resting membrane potential )
Correct Answer-Phase 4
Autoarythmic cells are also known as Correct Answer-pacemaker cells
Phase 4 in autoarythmic cells differ from phase 4 in cardiocytes in which
way ? Correct Answer-phase 4 in autoarythmic cells has no stable
resting membrane where as in cardiocytes, phase 4 has a resting
membrane potential.
Sequences of changes within the cell which causes it to depolarize and
repolarize. Correct Answer-Action potential
A Cardiocyte is a :
,a. Autoarythmic cell
b. Contractile Cell
c. A gap junction cell
d. excitile cell Correct Answer-b. Contractile cell
The inward movement of ions is known as Correct Answer-Influx
part of the cell that allows the voltage stimulation wave to travel from
cell to cell. Correct Answer-Gap Junctions
The result of ectopic Foci in the Atria Correct Answer-Atrial flutter
Adult Heart rate at rest is....70 -80 bpm. This is also know as _________
tone Correct Answer-Vagal Tone
Region of spontaneous firing within the heart Correct Answer-Ectopic
foci
The section between the sympathetic nervous system and the SA node
Correct Answer-Cardiac plexus
What slows the heart ?...Parasympathetic or sympathetic nervous system
Correct Answer-parasympathetic
, Fibers of the right vagus nerve enters the ________ node Correct
Answer-SA node
Fibers of the left vagus nerve enters the ________ node Correct Answer-
AV node
Cardiac cells do not have satellite cells to do what ? Correct Answer-
Repair muscle
What cellular structure occupies 25 % of a cardiocyte as compared to 1
% in most other cells ??? Correct Answer-Mitochondria
Cardiocytes contain ______ nucleus(s) and are surrounded by light
staining mass of _______ Correct Answer-one, Glycogen
What structures join cardiocytes end to end. Correct Answer-Intercalated
Discs
Interlocks with each other to increase surface area of contact in the
cardiocyte Correct Answer-Interdiating folds
What structure prevents cells from being pulled apart Correct Answer-
Desmosomes
What brings action potential to the sarcoplasmic reticulum Correct
Answer-T Tubules
Answers
Produced when a signal from the SA node spreads through the atria on a
ECG Correct Answer-P-Wave
Detects electrical current in the heart Correct Answer-Electrocardiogram
Generated by ventricular repolarization Correct Answer-T-Wave
produced when signal from AV node spreads through ventricular
myocardium and depolarizes muscle Correct Answer-QRS complex
The heart beats due to this Correct Answer-autorhythmicity
Charge shifts from negative to positive Correct Answer-Depolarization
Nerve like process that spreads action potential through ventricular
myocardium Correct Answer-Purkinjefibers
Primary Pacemaker cell of the heart Correct Answer-SA Node
Short branched cell found in the heart Correct Answer-Cardiocyte
Stores and pumps calcium ions Correct Answer-Sarcoplasmic reticulum
,Plateau phase of the cardiac action potential Correct Answer-Phase 2
Begins halfway through Phase 0 until part way thru phase 3 Correct
Answer-(Absolute ) Refractory period
allow action potential to spread through cells Correct Answer-Gap
junctions
Fast Na+ channels open in this phase Correct Answer-Phase 0
Phase in which cell is not stimulated ( resting membrane potential )
Correct Answer-Phase 4
Autoarythmic cells are also known as Correct Answer-pacemaker cells
Phase 4 in autoarythmic cells differ from phase 4 in cardiocytes in which
way ? Correct Answer-phase 4 in autoarythmic cells has no stable
resting membrane where as in cardiocytes, phase 4 has a resting
membrane potential.
Sequences of changes within the cell which causes it to depolarize and
repolarize. Correct Answer-Action potential
A Cardiocyte is a :
,a. Autoarythmic cell
b. Contractile Cell
c. A gap junction cell
d. excitile cell Correct Answer-b. Contractile cell
The inward movement of ions is known as Correct Answer-Influx
part of the cell that allows the voltage stimulation wave to travel from
cell to cell. Correct Answer-Gap Junctions
The result of ectopic Foci in the Atria Correct Answer-Atrial flutter
Adult Heart rate at rest is....70 -80 bpm. This is also know as _________
tone Correct Answer-Vagal Tone
Region of spontaneous firing within the heart Correct Answer-Ectopic
foci
The section between the sympathetic nervous system and the SA node
Correct Answer-Cardiac plexus
What slows the heart ?...Parasympathetic or sympathetic nervous system
Correct Answer-parasympathetic
, Fibers of the right vagus nerve enters the ________ node Correct
Answer-SA node
Fibers of the left vagus nerve enters the ________ node Correct Answer-
AV node
Cardiac cells do not have satellite cells to do what ? Correct Answer-
Repair muscle
What cellular structure occupies 25 % of a cardiocyte as compared to 1
% in most other cells ??? Correct Answer-Mitochondria
Cardiocytes contain ______ nucleus(s) and are surrounded by light
staining mass of _______ Correct Answer-one, Glycogen
What structures join cardiocytes end to end. Correct Answer-Intercalated
Discs
Interlocks with each other to increase surface area of contact in the
cardiocyte Correct Answer-Interdiating folds
What structure prevents cells from being pulled apart Correct Answer-
Desmosomes
What brings action potential to the sarcoplasmic reticulum Correct
Answer-T Tubules
