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Questions and Answers
What is the ability of cardiac fibers to respond to adequate stimuli and generate action potentials?
What is the ability of cardiac fibers to respond to adequate stimuli and generate action potentials?
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What is the resting membrane potential of a cardiac muscle fiber?
What is the resting membrane potential of a cardiac muscle fiber?
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What causes the rapid depolarization phase (phase 0) of a cardiac action potential?
What causes the rapid depolarization phase (phase 0) of a cardiac action potential?
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What is the primary cause of the plateau phase (phase 2) in a cardiac action potential?
What is the primary cause of the plateau phase (phase 2) in a cardiac action potential?
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What is the duration of the plateau phase in ventricular muscle?
What is the duration of the plateau phase in ventricular muscle?
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What is the period during which an excitable tissue will not respond to another stimulus called?
What is the period during which an excitable tissue will not respond to another stimulus called?
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What is the period during which no stimulus, regardless of its strength, can re-stimulate the excitable tissue called?
What is the period during which no stimulus, regardless of its strength, can re-stimulate the excitable tissue called?
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What is the ability of the heart muscle to contract and relax, performing mechanical work called?
What is the ability of the heart muscle to contract and relax, performing mechanical work called?
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What is the law that states that the greater the initial length of a cardiac muscle fiber, the greater the force of contraction?
What is the law that states that the greater the initial length of a cardiac muscle fiber, the greater the force of contraction?
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What is the term for the filling of the ventricles during diastole?
What is the term for the filling of the ventricles during diastole?
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What is the significance of the long absolute refractory period in cardiac muscle?
What is the significance of the long absolute refractory period in cardiac muscle?
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What is the role of calcium in cardiac muscle contraction?
What is the role of calcium in cardiac muscle contraction?
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What is the effect of sympathetic stimulation on cardiac properties?
What is the effect of sympathetic stimulation on cardiac properties?
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What is the effect of parasympathetic stimulation on cardiac properties?
What is the effect of parasympathetic stimulation on cardiac properties?
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What is the effect of moderate warming on cardiac properties?
What is the effect of moderate warming on cardiac properties?
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What is the effect of hyperkalemia (increased potassium levels) on cardiac properties?
What is the effect of hyperkalemia (increased potassium levels) on cardiac properties?
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What is the effect of hypercalcemia (increased calcium levels) on cardiac properties?
What is the effect of hypercalcemia (increased calcium levels) on cardiac properties?
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What is the effect of hypoxia (decreased oxygen levels) on cardiac properties?
What is the effect of hypoxia (decreased oxygen levels) on cardiac properties?
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What is the effect of hypercapnia (increased carbon dioxide levels) on cardiac properties?
What is the effect of hypercapnia (increased carbon dioxide levels) on cardiac properties?
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What is the effect of acidosis (decreased pH) on cardiac properties?
What is the effect of acidosis (decreased pH) on cardiac properties?
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What is the role of the sodium-potassium pump in cardiac muscle fibers?
What is the role of the sodium-potassium pump in cardiac muscle fibers?
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What is the role of the sarcoplasmic reticulum (SR) in cardiac muscle contraction?
What is the role of the sarcoplasmic reticulum (SR) in cardiac muscle contraction?
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What is the role of T-tubules in cardiac muscle contraction?
What is the role of T-tubules in cardiac muscle contraction?
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What is the significance of the plateau phase in the cardiac action potential?
What is the significance of the plateau phase in the cardiac action potential?
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What is the relationship between the mechanical response and the action potential in cardiac muscle?
What is the relationship between the mechanical response and the action potential in cardiac muscle?
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What is the significance of Starling's law of the heart?
What is the significance of Starling's law of the heart?
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What is the effect of catecholamines on cardiac properties?
What is the effect of catecholamines on cardiac properties?
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What is the effect of cholinergic stimulation on cardiac properties?
What is the effect of cholinergic stimulation on cardiac properties?
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What is the effect of bacterial toxins on cardiac properties?
What is the effect of bacterial toxins on cardiac properties?
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What is the significance of the 'all-or-none' rule in cardiac muscle contraction?
What is the significance of the 'all-or-none' rule in cardiac muscle contraction?
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