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Untitled Prezi

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by

Rey Comabig

on 14 July 2013

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Transcript of Untitled Prezi

What are the end products of Carbohydrates, Proteins and fats?
Thank you for bearing with us!

-Power Puff Gayrls
What is Digestion?
The process of breaking down food by mechanical and enzymatic action in the stomach and intestines into substances that can be used by the body.


Digestion is a form of catabolism: a break-down of larger food molecules to smaller ones that are more easily absorbed into a blood stream, for instance.
What is a Digestive System?
-- the system that makes food absorbable into the body.
The Digestive Hormones
Gastrin -
is in the stomach and stimulates the gastric glands to secrete pepsinogen (an inactive form of the enzyme pepsin) and hydrochloric acid. Secretion of gastrin is stimulated by food arriving in stomach. The secretion is inhibited by low pH .

Secretin -
is in the duodenum and signals the secretion of sodium bicarbonate in the pancreas and it stimulates the bile secretion in the liver. This hormone responds to the acidity of the chyme.

Cholecystokinin (CCK) -

is in the duodenum and stimulates the release of digestive enzymes in the pancreas and stimulates the emptying of bile in the gall bladder. This hormone is secreted in response to fat in chyme.

Gastric inhibitory peptide (GIP) -
is in the duodenum and decreases the stomach churning in turn slowing the emptying in the stomach. Another function is to induce insulin secretion.

Motilin -

is in the duodenum and increases the migrating myoelectric complex component of gastrointestinal motility and stimulates the production of pepsin.
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