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(MCQ) General Science: The Circulatory System

1. Consider the following statements.

(i) Vertebrates and a few invertebrates have a closed circulatory system.
(ii) Close circulatory systems have blood closed at all times within vessels.
(iii) Human circulatory system is called the cardiovascular system.

Which of the above are correct?

1. i & ii
2. ii & iii
3. iii only
4. All of the above

2. Consider the following statements regarding open circulatory system.

(i) In the open circulatory system blood flows into hemocoel with blood diffusing back to the cells.
(ii) Blood flow is sluggish.
(iii) Insects, mollusks & other invertebrates have an open system.

Which of the above are incorrect?

1. i & iii
2. ii & iii
3. None of the above
4. i only

3. Consider the following statements.

(i) Arteries are blood vessels that carry blood away from the heart.
(ii) Aorta is the main artery leaving the heart.
(iii) Pulmonary artery is the only artery that carriers oxygen rich blood.

Which of the above are false?

1. i & ii
2. ii & iii
3. iii only
4. i only

4. Consider the following statements.

(i) Arterioles are small arteries that connect larger arteries with capillaries.
(ii) Small arterioles branch into collection of capillaries known as capillary beds.
(iii) Capillary are thin walled blood vessels in which gas exchange occurs.

Which of the above are true?

1. i & ii only
2. ii & iii only
3. i, ii & iii
4. None of the above

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