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← Human Body & HealthA researcher studying osteoarthritis wants to reduce pain and inflammation. If they successfully block phospholipase A2 activity in chondrocytes, which consequence follows regarding prostaglandin synthesis?
A)Increased COX-2 mRNA transcription occurs
B)Prostaglandin E2 levels will rapidly increase
C)Cyclooxygenase activity is upregulated further
D)Arachidonic acid release will be inhibited✓
💡 Explanation
Blocking phospholipase A2 prevents the release of arachidonic acid from cell membrane phospholipids, because this is the initial step. Therefore, prostaglandin synthesis, which requires arachidonic acid, is inhibited, rather than being upregulated, thus reducing inflammation and pain.
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