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Question
The rate of heart beat is determined by
The rate of heart beat is determined by
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Solution
The correct option is A SA node
A specialized cardiac musculature called the nodal tissue is distributed in the heart. A patch of this tissue is present in the right upper corner of the right atrium called the sinoatrial node (SA node). The nodal musculature has the ability to generate action potentials without any external stimuli. However, the number of action potentials generated in a minute varies at different parts of the nodal system.The SA node can generate the maximum number of action potentials and is responsible for initiating and maintaining the rhythmic activity of the heart. As it sets the heart rate, it is called the pacemaker of the heart.The answer is A.
A specialized cardiac musculature called the nodal tissue is distributed in the heart. A patch of this tissue is present in the right upper corner of the right atrium called the sinoatrial node (SA node).
The nodal musculature has the ability to generate action potentials without any external stimuli. However, the number of action potentials generated in a minute varies at different parts of the nodal system.
The SA node can generate the maximum number of action potentials and is responsible for initiating and maintaining the rhythmic activity of the heart. As it sets the heart rate, it is called the pacemaker of the heart.
The answer is A.
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