Which blood component is responsible for the inhibition of platelet activation by binding to thromboxane A2 receptors?

A Prostacyclin ✓
B Thromboxane A2
C Adenosine diphosphate
D Platelet-activating factor

Explanation

Prostacyclin, also known as prostaglandin I2, is a potent inhibitor of platelet activation. It binds to thromboxane A2 receptors on platelets, thereby preventing platelet aggregation.

Mnemonic

Prosta = Prostacyclin → inhibits platelet activation

Source

Berne and Levy Physiology
Hematology Hematology: Blood Components Hematology: Blood Components Hard MEDICAL Confidence: high