This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Heart, Circulation, and Blood, Subject name: Physiology
Hormone involved in regulation of BP 
Select and explain. 
A. Serotonin, B. Angiotensin - II, C. Dopamine, D. Prostaglandin
B: Angiotensin - II
Answer: B: Angiotensin - II 
Explanation: Ans. (b) Angiotensin - IIRef: Ganong, 25th ed/p.575Angiotensin - II is a vasoconstrictor. By itself, it is involved in short term regulation of BPThe same angiotensin - II is also involved in long term regulation of BP as a part of Renin Angiotensin aldosterone system (RAAS)