Physiology Positive feedback is seen in A/E : A LH Surge B Entry of Ca into sarcoplasmic reticulum C Stimulation of gastric secretion of histamine & gastrin. D Thrombolytic activity in coagulation cascade. 💡 Explanation Positive feedback is seen in A/E : ✓ Correct Answer: C. Stimulation of gastric secretion of histamine & gastrin.