Podcast
Questions and Answers
Does parasympathetic stimulation have a negative effect on autorhythmicity?
Does parasympathetic stimulation have a negative effect on autorhythmicity?
True
Can the AV node become the pacemaker of the heart if the SA node fails?
Can the AV node become the pacemaker of the heart if the SA node fails?
True
Do action potentials occur in excitable cells such as cardiac muscle?
Do action potentials occur in excitable cells such as cardiac muscle?
True
Is the SA node the normal pacemaker of the heart?
Is the SA node the normal pacemaker of the heart?
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Is action potential of cardiac muscle known for its long duration?
Is action potential of cardiac muscle known for its long duration?
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Does sympathetic stimulation have a positive effect on autorhythmicity?
Does sympathetic stimulation have a positive effect on autorhythmicity?
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Does the depolarization of the membrane cause a large influx of sodium ions inside the cell?
Does the depolarization of the membrane cause a large influx of sodium ions inside the cell?
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Is the heart (cardiac muscle) characterized by automatic and rhythmic ability?
Is the heart (cardiac muscle) characterized by automatic and rhythmic ability?
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Does the heart have the ability to generate its own electric impulses and beat regularly?
Does the heart have the ability to generate its own electric impulses and beat regularly?
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Is the AV node a potential pacemaker of the heart if the SA node fails?
Is the AV node a potential pacemaker of the heart if the SA node fails?
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Hyperpolarization occurs due to the influx of anions (Cl– ions) through the chloride channels
Hyperpolarization occurs due to the influx of anions (Cl– ions) through the chloride channels
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Refractory period refers to the amount of time it takes for an excitable membrane to be ready to respond to a second stimulus
Refractory period refers to the amount of time it takes for an excitable membrane to be ready to respond to a second stimulus
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The cardiac electric impulse is generated from the autorhythmic cells in the AV node
The cardiac electric impulse is generated from the autorhythmic cells in the AV node
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The closing of sodium ion channels and opening of potassium ion channels leads to repolarization
The closing of sodium ion channels and opening of potassium ion channels leads to repolarization
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Conductivity is the ability of the cardiac muscle to transmit action potential from one cell to the next through the conductive system
Conductivity is the ability of the cardiac muscle to transmit action potential from one cell to the next through the conductive system
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The cardiac electric impulse spreads to the right and left atria of the heart
The cardiac electric impulse spreads to the right and left atria of the heart
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The cardiac electric impulse passes in the AV node to reach the ventricles
The cardiac electric impulse passes in the AV node to reach the ventricles
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Opening of voltage gated Ca+2 channels leads to contraction of cardiac muscle (systole)
Opening of voltage gated Ca+2 channels leads to contraction of cardiac muscle (systole)
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The AV node allows the passage of the cardiac electric impulse slowly (AV nodal delay)
The AV node allows the passage of the cardiac electric impulse slowly (AV nodal delay)
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Contraction of the myocardial muscle (Diastole) is caused by the closing of sodium ion channels and opening of potassium ion channels
Contraction of the myocardial muscle (Diastole) is caused by the closing of sodium ion channels and opening of potassium ion channels
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