Answer: Ghrelin Hormone
Explanation:
Ghrelin hormone is a hormone produced by the stomach and is termed a hunger stimulant.
Ghrelin hormone promotes responses to food and food related odours.
Ghrelin hormone also controls the extent to which the brain reacts to food-related cues and is a major factor in heightened response to food cues.
I think it would be sphygmomanometer, if I understood the question right.
