Which blood component plays a crucial role in the regulation of blood pressure through the conversion of angiotensin I to angiotensin II?

A Eosinophils
B Basophils
C Monocytes
D Endothelial cells ✓

Explanation

Endothelial cells play a crucial role in the regulation of blood pressure through the conversion of angiotensin I to angiotensin II by releasing angiotensin-converting enzyme (ACE).

Source

Guyton and Hall Textbook of Medical Physiology
Hematology Hematology: Blood Components Hematology: Blood Components Hard MEDICAL Confidence: high