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
In gastric  secretion, gastrin acts on ________ receptor on parietal cells 
Select and explain. 
A. G receptor, B. H receptor, C. CCKb receptor, D. M receptor
C: CCKb receptor
Answer: C: CCKb receptor 
Explanation: Gastrin acts on cholecytokininB ( CCK B) receptor on parietal cells for gastric secretion.