Multiple choice

Blood platelets are also known as thrombocytes. Which of the following statements is correct for blood platelets?

  1. They are present in greater number than RBCs.

  2. They release main clotting factors in the blood.

  3. They attach to the walls of damaged blood vessels.

  4. They conjoin in the presence of prostacyclin.

  5. Blood platelets bear a prominent nucleus that regulates hemostasis and thrombosis.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In case of injury, the damaged endothelial cells lining the blood vessel release von Willebrand's Factor, which makes the surfaces sticky. The platelets start adhering to the surfaces of endothelial cells. This effect is called platelet adhesion.

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