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Physiology General 84d330fd

Positive feedback is seen in all except

A
LH surge
B
Entry of calcium into sarcoplasmic reticulum
C
Gastric secretion
D
Thrombus formation
High-Yield Explanation
Ans. (c) Gastric secretion(Ref: Guyton, 13th ed/p.7)Gastric secretion is an example for a negative feedbackIncrease in levels of gastric acid inhibits its own productionPositive feedback - once started, it enhances or amplifies the effect on its own. That is why positive feedback is also called VICIOUS CYCLEExamples of positive feedback are, (CLASP)#Clotting#LH surge#Action potential#Shock#Parturition

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