Multiple choice

The ability of junctional tissue of the heart to generate its own impulses is called

  1. autorhythmicity

  2. sinus venosus

  3. contractility

  4. staircase phenomenon

  5. echocardiography

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A Correct answer
Explanation

The ability of junctional tissue of the heart to generate its own impulses without external stimulation is called autorhythmicity. This is due to a small percentage of muscle cells called autorhythmic cells that are specialised to generate and conduct action potentials and make up the conduction system of the heart.