NEET 2017
- Exam
- NEET
- Year
- 2017
- Subject
- Zoology
- Chapter
- Structural Organisation in Animals
NEET 2017 · Zoology · Structural Organisation in Animals
Frog's heart when taken out of the body continues to beat for...
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
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
- AOnly (iii)
- BOnly (iv)
- C(i) and (ii)
- 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.