All of the following are example of feed forward control system except
Temperature regulation
BP regulation
Cephalic phase of gastric secretion
Increased heart rate before start of exercise
BP regulation is example of negative feedback control.
Feedforward control :
In this, it anticipates the discharge and prevent the change in 'controlled variable' by generating a corrective command that anticipates the change in 'controlled variable'
Example :

Temperature regulation
Cephalic phase of gastric secretion
Increase in heart rate and respiratory rate even before exercise.
Cerebellar action in motor co-ordination.