In insect physiology, what specialized excretory tubules absorb nitrogenous waste from the hemolymph and discharge it as solid uric acid into the hindgut?
Answer and explanation
Correct answer: A. Malpighian tubules
- Step 1: Insects possess Malpighian tubules lying in the hemocoel between the midgut and hindgut. Step 2. They extract potassium, water, and urates, precipitating uric acid into the gut to conserve water. Answer: Malpighian tubules. Why not the others: Nephridia are found in earthworms; flame cells (protonephridia) in flatworms; green glands (antennal glands) in crustaceans.
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