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Q.
Heart muscle is sensitive to
Body Fluids and Circulation
Solution:
Heart muscles are sensitive to electrical, chemical and mechanical stimulus. Conduction of heart beat across the heart is an electrical process. Chemicals (hormones) such as adrenaline, nor-adrenaline and thyroxine can accelerate heart beat. Physical stimuli such as artificial pacemaker also stimulates the heart at regular intervals to maintain its beat.