PHYSIOLOGY
CARDIOVASCULAR PHYSIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What type of effect is shown when there is a change in the degree of excitability or irritability of cardiac muscle?
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chronotrophic
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dromotrophic
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inotrophic
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bathmotropic
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Explanation:
Detailed explanation-1: -The bathmotropic effect modifies the heart muscle membrane excitability, and thus the ease of generating an action potential.
Detailed explanation-2: -Stimulation of the Beta1-adrenergic receptors in the heart results in positive inotropic (increases contractility), chronotropic (increases heart rate), dromotropic (increases rate of conduction through AV node) and lusitropic (increases relaxation of myocardium during diastole) effects.
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