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Assertion : In amphibians incomplete dou...

Assertion `:` In amphibians incomplete double circulation presents.
Reason `:` In amphibians oxygenated and deoxygenated blood get mixed up in the single ventricle which pumps out mixed blood.

A

If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion .

B

If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion

C

If Assertion is True but the Reason is False.

D

If both Assertion & Reason are false.

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Mixing of oxygenated and deoxygenated blood occurs in the ventricle of

Mixing of oxygenated and deoxygenated blood occurs in the heart of

In which animal the heart pumps out only deoxygenated blood?

[A] : A complete double circulation occurs in birds for the first time. [R]: At no point is there any opportunity for oxygenated and unoxygenated blood to mix.

Identify whether the given statements are true or false for double circulation. I. It checks the mixing of oxygenated and deoxygenated blood. II. It carries only oxygenated blood. Choose the correct option accordingly.

Assertion : There is no mixing of oxygenated and deoxygenated blood in the human heart. Reason : Valves are present in the heart which allows the movement of blood in one direction only.

Assertion : Atria act as primer pumps that increase the ventricular pumping Reason : About 80 precent of the blood flows directly through the atria into ventricles.

Assertion : Double circulation is incomplete in amphibians and reptiles Reason : Unlike in birds and mammals, in amphibian and reptiles, the left atrium receives oxygenated blood and right atrium receives deoxygenated blood.

Which of the following statement (s) is (are) true about heart? (i) Left atrium receives oxygenated blood from different parts of body while right atrium receives deoxygenated blood from lungs (ii) Left ventricle pumps oxygenated blood to different body parts while right ventrivle pumps deoxygenated blood to lungs (iii) Left atrium transfers oxygenated blood to right ventricle which sends it to different body parts (iv) Right atrium receives deoxygenated blood from different part of the body while left ventricle pumps oxygenated blood to dofferent parts of the body

Assertion : The heart of fish contains only deoxygenated blood. Reasoning : Oxygenated blood does not return back to the heart in fishes.

ALLEN-HUMAN PHYSIOLOGY -I-EXERCISE-IV(Assertion & Reason)
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  3. Assertion : In amphibians incomplete double circulation presents. Re...

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  4. Assertion : In open circulatory system blood is pumped by heart passes...

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  5. Assertion: In fishes single circulation occur Reason : Fishes have a...

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  8. Assertion : The opening between the right atrium and the right ventric...

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  9. Assertion : Cardiac output is the volume of blood pumped out by each v...

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  10. Assertion : First heart sound (LUBB) is produced at the beginning of v...

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  13. Assertion :- Mostly aquatic animals are ammonotelic. Reason :- Ammon...

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  14. Assertion :- In fish ammonia is excreted by diffusion through gill sur...

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  15. Assertion :- Uricotelism is terrestrial adaptation. Reason :- Uric...

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