five fictional specimens were injected with either 1 ml. of gastrin, secretin, cck, gip, or acetylcholine (ach). a control specimen was injected with 1 ml. of saline. using the data provided and your knowledge of gi physiology, determine which specimen received which hormone. for this specimen, the following changes were noted: drops of saliva 70 (control 10) ph of stomach 1 (control 1) motility of stomach 15 (control 3) motility of small intestine 30 (control 15) strength of contraction 50 (control 10) based on the above data, this specimen was injected with.... a. acetylcholine (ach) b. cholecystokinin c. gastric inhibitory peptide (gip) d. secretin