PATHOLOGY MCQ
BLOOD VESSELS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What is the automatism of the heart?
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Automatism of the heart lies in the ability of myocytes to contract rhythmically under the influence of impulses generated in the heart.
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the ability to beat rhythmically under the influence of impulses from the heart itself
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it is the ability of the heart muscle to be excited by various stimuli of a physical or chemical nature, accompanied by changes in the physicochemical properties of the tissue.
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is carried out in the heart electrically due to the formation of an action potential in the pacemaker cells. Nexuses serve as the place of transition of excitation from one cell to another.
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Explanation:
Detailed explanation-1: -Answer and Explanation: The correct answer is (B): Autorhythmicity is the ability of a cell to spontaneously generate rhythmic action potentials. Auto means self; hence, excitable cells that can generate rhythmic action potentials without being stimulated by any inputs are called autorhythmic cells.
Detailed explanation-2: -Conductivity: each muscle cell can pass electrical impulses from cell to cell. Automaticity: ability to contract without direct stimulation by nervous system. Irritability: ability to respond in a specific way to changing conditions of body tissues.
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