Collect information related to feeling hunger from your school library and prepare a note on it. (AS4)

a. Hunger is closely related to the amount of glucose present in the blood.

b. When the level of glucose is low, a cascade of events lead to production of many proteins, including a hormone called Ghrelin.

c. Secretion of ghrelin takes place in the stomach when it’s empty. Upon its secretion, the stomach starts having hungerpangs or contractions that generate hunger signals that reach the brain and give us the feeling of hunger.

d. When the glucose level is high, i.e. the stomach is full, another hormone called Leptin is secreted which suppresses the feeling of hunger.

e. The sight and smell of the food can also determine hunger as it has been observed that we tend to prefer the food which is much more visually appalling and smells good.