Assertion (A): Arteries do not have valves yet blood flows only in one direction.
Reason (R): Blood flows under high pressure inside the arteries.

Both A and R are false.

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Only A is true but R is false.

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Both A and R are true and R is the incorrect explanation for A.

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Both A and R are true and R is the correct explanation for A.

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Solution

The correct option is D Both A and R are true and R is the correct explanation for A.

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Similar questions

Veins have valves which allow blood to flow only in one direction. Arteries do not have valves. Yet the blood flows in one direction only. Can you explain why?

Q. State the true statements of the following:

(1)

Blood flowing in arteries is without high pressure.

(2)

Blood flowing in veins is without high pressure.

(3)

Veins have valves opening towards heart.

(4)

Arteries have valves opening towards heart.

Question 21
Choose the correct statement that describes arteries.

(a) They have thick elastic walls, blood flows under high pressure; collect blood from different organs and bring it back to the heart.
(b) They have thin walls with valves inside, blood flows under low pressure and carries blood away from the heart to various organs of the body.
(c) They have thick elastic walls, blood flows under low pressure; carry blood from the heart to various organs of the body.
(d) They have thick elastic walls without valves inside, blood flows under high pressure and carries blood away from the heart to different parts of the body.

Q. Blood in arteries flow under high pressure. Therefore, they have _______ and elastic walls.

Q. Blood in arteries flow under high pressure. Therefore, they have and elastic walls.

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Assertion (A): Arteries do not have valves yet blood flows only in one direction. Reason (R): Blood flows under high pressure inside the arteries.

The correct option is D Both A and R are true and R is the correct explanation for A.

Assertion (A): Arteries do not have valves yet blood flows only in one direction.
Reason (R): Blood flows under high pressure inside the arteries.