Collect information related to feeling and hunger from your school library

biology
cbse-class-10
coordination-in-life

#1

Collect information related to feeling and hunger from your school library andprepare a note on it.
A. 1) Hunger is a sensation experienced when one feels the physiological need to eat food.
2) A healthy well- nourished individual can survive for weeks without food intake.
3) Hunger is also the most commonly used term to describe the condition of people who suffer from a chronic lack of sufficient food and constantly or frequently experience the physical sense of hunger.
4) When hunger contractions start to occur in the stomach, they are informally referred to as hunger pangs. Hunger pangs usually do not begin until 12 to 24 hours after the last ingestion of food.
5) A single hunger contraction lasts about 30 seconds, and pangs continue for about 30-45 minutes, then hunger subsides for around 30-150 minutes.
6) Emotional states may inhibit hunger contraction levels of hunger are increased by lower blood sugar levels, and are higher in diabetics.
7) The fluctuation of leptin and ghrelin hormone levels results in the motivation of an organism to consume food. Increasing levels of leptin result in a reduction of one’s motivation to eat. Low levels of leptin cause the release of a secondary hormone, ghrelin which inturn initiates the feeling of hunger.
8) Some studies have suggested that an increased production of ghrelin may enhance appetite evoked by the sight of food, while an increase in stress may also influence the hormone’s production.
9) The brain uses to evaluate the contents of the gut through vagal nerve fibres that carry signals between the brain and the gastrointestinal tract.
10) Blood level of glucose, amino acids and fatty acids provide a constant flow of information to the brain that may be linked to regulating hunger and energy intake.