Question

Which of the following anticoagulant is secreted by leech?

• A. Hirudin
• B. Heparin
• C. Serotonin
• D. Histamine

Answer 1

The correct option is A Hirudin

Hirudinaria is the blood-sucking leech. It is an ectoparasite annelid. It secretes hirudin as an anticoagulant. It is a naturally occurring peptide that occurs in the salivary gland of the leech. It has medicinal importance. It binds to the thrombin and inhibits only the activity of thrombin, which prevents or dissolves the formation of clots.

So, the correct answer is option A.