Given below are two statements.
Statement I: Normal activities of the heart are regulated intrinsically.
Statement II: Sympathetic stimulation increases the heart rate while parasympathetic stimulation decreases the heart rate.
In light of the above statements, choose the most appropriate answer from the options given below.

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Statement I is correct but statement II is incorrect.

Statement I is incorrect but statement II is correct.

Both statement I and statement II are correct.

Both statement I and statement II are incorrect.

answer is C.

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Detailed Solution

Statement I is true. The heart has its intrinsic regulatory system, which includes the sinoatrial (SA) node, atrioventricular (AV) node, and the conducting fibres. These components generate electrical impulses and coordinate the heartbeat without external input.

Statement II is also true. The sympathetic nervous system can increase heart rate and force of contraction, while the parasympathetic nervous system can decrease heart rate via the vagus nerve .

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