NEET Biology Structural Organisation In Animals Based Practice Questions & Answers with Viewers Discussion and Detailed Explanation
Question & Answer Discuss:
Frog's heart when taken out of the body continues to beat for sometime.
Select the best option from the following statements.
- Frog is a poikilotherm.
- Frog does not have any coronary circulation.
- Heart is "myogenic" in nature.
- Heart is autoexcitable.
(a) (1) and (2)
(b) Only (4)
(c) (3) and (4)
(d) Only (3)
Answer: (c)
Frog's heart is myogenic, i.e., heartbeat originates from muscles of heart. Hence, it is autorhythmic. 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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NEET Biology MCQ Topic Wise Exercise
-
The Living World
-
Biological Classification
-
Plant Kingdom
-
Animal Kingdom
-
Morphology of Flowering Plants
-
Anatomy of Flowering Plants
-
Structural Organisation in Animals
-
Cell-The Unit of Life
-
Biomolecules
-
Cell Cycle and Cell Division
-
Transport in Plants
-
Mineral Nutrition
-
Photosynthesis in Higher Plants
-
Respiration in Plants
-
Plant Growth and Development
-
Digestion and Absorption
-
Breathing and Exchange of Gases
-
Body Fluids and Circulation
-
Excretory Products and Their Elimination
-
Locomotion and Movement
-
Neural Control and Coordination
-
Chemical Coordination and Integration
-
Reproduction In Organisms
-
Sexual Reproduction in Flowering Plants
-
Human Reproduction
-
Reproductive Health
-
Principles of Inheritance and Variation
-
Molecular Basis of Inheritance
-
Evolution
-
Human Health and Diseases
-
Strategies for Enhancement in Food Production
-
Microbes in Human Welfare
-
Biotechnology: Principles and Processes
-
Biotechnology and Its Applications
-
Organisms and Populations
-
Ecosystem
-
Biodiversity and Conservation
-
Environmental Issues
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