Podcast Beta
Questions and Answers
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?
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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?
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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?
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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?
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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?
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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?
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What is the role of calcium in cardiac muscle contraction?
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What is the effect of sympathetic stimulation on cardiac properties?
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What is the effect of parasympathetic stimulation on cardiac properties?
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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?
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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?
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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?
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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?
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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?
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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?
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What is the effect of catecholamines on cardiac properties?
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What is the effect of cholinergic stimulation on cardiac properties?
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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?
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