NEET · Biology · STD 11 - 7. Structural organisation in animal
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.
- A Only \((4)\)
- B \((1)\) and \((2)\)
- C \((3)\) and \((4)\)
- D Only \((3)\)
Answer & Solution
Correct Answer
(C) \((3)\) and \((4)\)
Step-by-step Solution
Detailed explanation
(c) : Frog's heart is myogenic, \(i.e.\), heartbeat originates from muscles of heart. Hence, it is autorythmic. Wave of contraction originates from sinus venosus and spreads to wall of sinus venosus and both auricles. This compels the heart to beat. Due to this reason, frog’s heart will continue to beat as long as it gets supply of \(ATP.\)
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