Question

Coagulation of hemolymph is associated with the pigment:

• A. Oenocytoids
• B. Spherules
• C. Cystocytes
• D. Adipohaemocytes

Hint:

Coagulocytes are the "platelet equivalent" of insects. Think of "Cystocytes" as highly sensitive cells that break open to trigger plasma clotting at injury sites.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
Hemolymph coagulation (clotting) is a vital defense mechanism in insects to prevent fluid loss and entry of pathogens following injury.

Step 2: Detailed Explanation:
Insect hemolymph contains several classes of circulating cells (hemocytes).
Among these, the cystocytes (also known as coagulocytes) are highly fragile cells containing specialized inclusions.
Upon contacting foreign surfaces or injury sites, cystocytes rapidly rupture, releasing coagulogen/chromoprotein-complexes that initiate the precipitation of hemolymph proteins and form a stable clot.

Step 3: Final Answer:
The hemocytes associated with hemolymph coagulation are cystocytes, which is option (C).