Q173 / 180 · AIIMS 2014 · Zoology

Assertion : Human heart is myogenic. Reason: The contraction is initiated by a specialized patch of modified heart muscles without requiring stimulation from nerve cells.

  • Correct answer
    A
    If both assertion and reason are true and reason is the correct explanation of assertion.
  • B
    If both assertion and reason are true but reason is not the correct explanation of assertion.
  • C
    If assertion is true but reason is false.
  • D
    If both assertion and reason are false.

Solution

The mammalian heart is myogenic. It means the heart beat originates from a specialised muscles (nodal tissue). It is regulated by the nerves.

Hence, the correct answer is option: 'A'.

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