Pathology All of the following about prostaglandins are TRUE, EXCEPT: A Synthesised from arachidonic acid B First isolated from semen C Prostaglandins contain a cyclopentane ring D PGE1 and PGE2 increase in bronchial asthma 💡 Explanation All of the following about prostaglandins are TRUE, EXCEPT: ✓ Correct Answer: D. PGE1 and PGE2 increase in bronchial asthma