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32 Cards in this Set
- Front
- Back
Functions of Digestive System? |
-breakdown foods and nutrients - absorb nutrient -absorb water -secrete wastes |
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Start of digestion? |
Mouth |
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Breaking down food into smaller particles by chewing, grinding and cutting |
Teeth |
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A liquid producrd by the Salivary Glands |
Saliva |
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It has chemical receptoes sensitive to the chemical composition and specific tastes of food |
Tongue |
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Tongue's 5 different tastes |
Sweet Sour Bitter Salyu Umami |
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Flap of tissue that covers the trachea |
Epiglottis |
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Tube that connects mouth and stomach; it is a passageway |
Esophagus |
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The rhythmic contraction of the gut muscles that propels materials along the length of the digestive tract |
Peristalsis |
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Acid digestion occurs in the stomach |
Stomach |
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Stomach releases two types of acid |
Gastrin and Pepsin |
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A hormone stimulates acid release |
Gastrin |
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An enzyme that breaks up proteins, requires an acidic environment to become active |
Pepsin |
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Causes pain when stomach is empty, these are bacterial infection that create ulcerations |
Stomach ULCERS |
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Due to weakness in the sphincter muscle at the top of the stomach |
Acid Reflux |
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Lined with millions of microvili |
Small Intestine |
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The walls of small intestine is the site of? |
Nutrient Absorption |
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It also occurs during nutrient reabsorption |
Water reabsorption |
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Small intestine: -Digestion of food starts |
Duodenum |
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Small intestine: -final chemical digestion and nutrient absorption takes place |
Jejunum |
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Small Intestine: -final absorption of digested foods |
Ileum |
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Releases pancreatic juice,containing bicarbonate, lipases, proteases and amylase |
Pancreas |
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Makes bile which emulsifies fats |
Liver |
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Made from cholesterol which is made in the liver |
Bile |
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Vastly increase the intestines surface area |
Villi and Microvilli |
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Water from digested food is absorbed |
Large Intestine |
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It is formed from fiber and other undigested material |
Feces |
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Most Digestion occurs in |
Small intestine |
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Why do we have microvilli |
Because it increased the intestines surface area |
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Found in the stomach produced when food is present and signals the release of acid |
Gastrin |
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Signals the release of soidum bicarbonate for the pancreas |
Secretin |
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Recently discovered and control appetite |
Ghrelin and Leptin |