Which of the following does not characterize platelets?
A) They are cell fragments released by megakaryocytes.
B) They lack organelles.
C) They are packed with chemicals and enzymes necessary for blood clotting.
D) They are activated by collagen.
E) They are formed outside the bone marrow.

Question

Quizplus · Accepted Answer

Platelets are formed inside the bone marrow from megakaryocytes and are released into the bloodstream as cell fragments. They are also known as thrombocytes and play a key role in blood clotting. Platelets are activated by factors such as collagen, which is exposed when there is injury to a blood vessel. Therefore, all of the choices except E accurately characterize platelets.

Which of the Following Does Not Characterize Platelets