This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
Which causes antral gastrin release 
Select and explain. 
A. Antral distension, B. Acid, C. Secretin, D. Calcitonin
A: Antral distension
Answer: A: Antral distension 
Explanation: Gastrin release stimulated by
-        Distension of stomach
-        Peptides and amino acids in stomach and duodenum
-        Vagal neurotransmitter GRP
-        Epinephrine
 Gastrin release inhibited by
-        Acid in duodenum
-        Secretin, GIP, VIP, CCK, somatostatin, glucagon, calcitonin