Question

Identify the correct statements:
I. Veins are bright red in colour and provided with wide lumen  
II. Veins are non-valvular and blood flows in veins by jerks.  
III. Arteries are provided with thick tunica media.  
IV. Veins end in capillaries and arteries start with capillaries.  

• A. III and IV
• B. I and II
• C. III only
• D. IV only

Hint:

The arteries have a thick tunica media to manage high blood pressure, whereas veins have a thinner wall and a wider lumen to accommodate low-pressure blood returning to the heart.

Answer 1

The Correct Option is C

Let's analyze each statement:

• Statement I: "Veins are bright red in colour and provide with wide lumen."
  This is incorrect because veins are typically darker red due to deoxygenated blood. Also, veins do not have particularly wide lumens compared to arteries.
• Statement II: "Veins are non-vascular and blood flows in veins by jerks."
  This is incorrect. Veins are vascular and carry deoxygenated blood (except pulmonary veins). Blood flow in veins is more continuous, aided by skeletal muscle contractions and the heart's pumping action, not jerks.
• Statement III: "Arteries are provided with thick tunica media."
  This is correct. Arteries have a thick tunica media (the muscular middle layer) that helps them withstand the high pressure of the blood pumped by the heart.
• Statement IV: "Veins end in capillaries and arteries start with capillaries."
  This is incorrect. Arteries start from the heart and branch into arterioles, which then lead to capillaries. Veins carry blood back to the heart and do not end in capillaries.

Thus, the correct statement is III only, and Option (C) is the correct answer.