2006-10-30 11:07:25 · 5 answers · asked by jonathon t 1 in Science & Mathematics ➔ Medicine
It is an extremely complex hormonal signal system, beginning with cholecystokinin, which signals the body to release bile from the gallbladder into the duodenum when there if food present. Leptins and dozens of other chemical signals (hormones) are sent that notify the receptors in the hypothalamus and thalamus of the brain, which then modifies the sensation of hunger/satiety. There are both alpha and beta cells in the islets of Langerhans in the pancreas that help maintain normal amounts of glucose, and that is another arm of this complex system.
Much of this is still under investigation, and once it is definitively found, we will be a lot further along in understanding and controlling obesity and other eating disorders.
2006-10-30 15:07:59 · answer #1 · answered by finaldx 7 · 0⤊ 0⤋
When your stomach fills up, it sends a signal to the hypothalamus in your brain (the center behind many basic subconscious functions like thirst and hunger) through the vagus nerve, a complicated and slow pathway. This can take up to 40 minutes.
(ironic, considering the average speed of touch data transmission along nerves in the body is upwards of 250 mph!)
2006-10-30 19:12:24 · answer #2 · answered by Anonymous · 0⤊ 0⤋
When your stomach full,the wall of stomach distends ,and the nerves endings in the stomach wall are activated ,and they send signals to the brain.
But satiety is different from fulling.Satiety is triggered by certain substances such as fats.The substances trigger the chemical sensors of the stomach wall and finally to the brain.
The nervous pathway from stomach to brain is by vagus nerve ,but the pathway from vagus nuclei to the cerebral cortex (where all sensations are identified) is pretty complicated.
2006-10-31 00:17:34 · answer #3 · answered by elle 2 · 0⤊ 0⤋
there are more ways. first there are some stretch receptors in the wall of the stomach that send out signals when it is getting filled. then, contractions begin to digest the food, which is a ngative feedback that cancels the desire for food. and in the hypothalamus there are food and hunger centers that receive the signals from all receptors and they further send signals to the cerebral cortex in order to stop one from excesive feeding. there is also studied the role of an enzyme called leptine which is beleved to diminish the amount of food needed by a person in case there is an excesive amount of fat in the tissues. this doesn't seem to work in obese people.
2006-10-31 15:14:55 · answer #4 · answered by Crystall22 2 · 0⤊ 0⤋
You're supposed to wait something like... i dunno but.. it just knows k?
2006-10-30 19:08:34 · answer #5 · answered by Anonymous · 0⤊ 1⤋