NEET Biology question
Frog's heart when taken out of the body continues to beat for sometime. Select the best option from the following statements. 1. Frog is a poikilotherm. 2. Frog does not have any coronary circulation. 3. Heart is "myogenic" in nature. 4. Heart is autoexcitable.
Answer: (C)
Solution
The isolated frog heart continues beating because it is myogenic — the impulse for contraction originates within the heart muscle itself (specifically the sinus venosus, acting as the pacemaker) rather than depending on external nerve stimulation — and this
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