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Q. No.
Consider the given two statements:
Assertion (A):  Open circulatory system is considered to be more advantageous than the closed circulatory system.
Reason (R):  The flow of fluid can be more precisely regulated in open circulatory system than in closed circulatory system.
 
1. Both (A) and (R) are True and (R) is the correct explanation of (A).
2. Both (A) and (R) are True but (R) is not the correct explanation of (A).
3. (A) is True but (R) is False.
4. Both (A) and (R) are False
Subtopic:  Circulatory Pathways |
 92%
Level 1: 80%+
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An open circulatory system
1. is typically found in animals with a two chambered heart
2. typically includes a hemocoel
3. has a continuous circuit of vessels with openings in the capillaries
4. is characteristic of vertebrates
Subtopic:  Circulatory Pathways |
 66%
Level 2: 60%+
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Consider the following statements regarding the circulatory pathways in the human body:
 
I: The pulmonary artery carries deoxygenated blood from the right ventricle to the lungs.
II: The pulmonary veins carry oxygenated blood from the lungs to the left atrium.
III: The systemic circulation provides nutrients, O2, and other essential substances to tissues and removes CO2 and other harmful substances.
IV: The hepatic portal vein carries blood from the liver to the intestine before it is delivered to the systemic circulation.
V: The coronary system is responsible for the circulation of blood to and from the cardiac musculature.
 
Which of the above statements are correct?
 
1. Only I, II, and III
2. Only I, II, and V
3. Only I, II, III, and V
4. Only I, III, and IV
Subtopic:  Circulatory Pathways |
 84%
Level 1: 80%+
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Which one of the following animals has two separate circulatory pathways?

1. Frog 2. Lizard
3. Whale 4. Shark
Subtopic:  Circulatory Pathways |
 67%
Level 2: 60%+
NEET - 2015
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Consider the two statements:
Assertion (A): Open circulatory system is considered to be more advantageous than the closed circulatory system.
Reason (R): Open circulatory system is present in arthropods and molluscs, two of the most successful animal phyla. 
 
1. Both (A) and (R) are True and (R) correctly explains (A).
2. (A) is True but (R) is False.
3. Both (A) and (R) are True but (R) does not correctly explain (A).
4. (A) is False but (R) is True.
Subtopic:  Circulatory Pathways |
 87%
Level 1: 80%+
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How many of the given statements are correct:
I: Fishes have a 2-chambered heart with an atrium and a ventricle.
II: Amphibians and the reptiles (except crocodiles) have a 3-chambered heart with two atria and a single ventricle.
III: Crocodiles, birds and mammals possess a 4-chambered heart with two atria and two ventricles.
IV: The only vertebrates where the heart pumps out deoxygenated blood are fishes.
 
1. 1 2. 2
3. 3 4. 4
Subtopic:  Circulatory Pathways |
Level 3: 35%-60%
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