Lesson: Chapter 6 — Human body processes

6.4. Blood 4 of 5 Reset answers

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Question 4

What do platelets release when a blood vessel is damaged?

A Haemoglobin B Thromboplastin C Urea D Insulin

The right answer is the one marked above.

Thromboplastin. It starts the chain that forms fibrin threads and a clot.

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