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NEET2017ZoologyStructural Organisation in AnimalsActual

Frog's heart when taken out of the body continues to beat for sometime. Select the best option from the following statements: (i) Frog is a poikilothermic (ii) Frog does not have any coronary circulation (iii) Heart is "myogenic" in nature (iv) Heart is autoexcitable

Options

  1. AOnly (iii)
  2. BOnly (iv)
  3. C(i) and (ii)
  4. D(iii) and (iv)

Correct answer

D. (iii) and (iv)

Step-by-step solution

Frog or the vertebrates have myogenic heart (auto excitable). In this heart, beat is originated by a group of muscle fibres which is situated in the wall of the heart. So wave of contraction is generated inside the heart.

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