CH 17 Digestion Flashcards
Mouth to anus is known as
Alimentary Canal
Movement of food through bowels
Peristalsis
Special lymph Capillaries. What do they do?
Lacteals, absorb fats and fat soluble vitamins
Covers inner surface of digestive tract
Epithelium cells
increases activities of the digestive system
parasympathetic
Inhibits certain digestive actions
sympathetic
Another word for chewing
mastacation
where does chemical digestion begin?
Mouth
How many baby (decidious teeth) do we have?
20
How many permanent teeth do we have
32
2 glands that sit in front of ears, aide in chewing
parotid glands
enzyme that is produced by salivary gland
amylase
major salivary glands
parotid
Sublingual
Submandibular
How many layesr of smooth muscle in the stomach?
3
Where does Chemical digestion of protein begin?
Stomach
What produces Pepsinogen?
Cheif cells of the stomach, turns into pepsin
What produces Hydrochloric Acid?
Parietal cells in gastric glands
What produces mucus
Stomach epithelial cells, foveolar cells in gastric pit
List the phases of Gastric Secretion
Cephalic, Gastric, intestinal
Sight taste smell of food that triggers parasympathetic reflexes. Gastric juice is secreted as a response
Cephalic phase
Food in stomach chemically and mechanically stimulates the release of gastrin, which stimulates secretion of gastric juice;
Gastric Phase
As food enters small intestine, it stimulates intestinal cells to release gastrin, promotes secretion of gastric juice from stomach wall.
Intestinal Phase
What does amylase do
digest carbs
lipases
lipids
proteases
proteins
nucleases
nucleic acid
what does pancrease release
pancrease juice
Digestive hormone that stimulates the release of bicarbonate-rich pancreatic fluid
SECRETIN
What stimulates pancreas to release pancreas juice
Acidity in Chyme stimulates the release of seretin which stimulates the pancrease to release pancrease juice
Steps of pancreatic secretion
Acidic chyme enters the duodenum, intestinal mucosa releases secretin, secretine stimulates pancreas to secret bicarb, pancreatic juice juice passes down pancreatic ducts to the duodenum
Largest internal organ
liver
important metabolic activities of liver
produce glycogen, break down glycogen into glucose, phagocytosis of worn out rbc and foreign substances, removes toxins like drugs and alcohol from blood
what imulsifies fat?
bile
major site of chemical digestion
small intestine
numerous crescentic folds of mucus membrane found in small intestines’
Plicase Circulares
What cells secret mucus in small intestine
goblet cells
Enzymes in membrans of microvili
secretin, lipase, lactase, peptide
function of large intestine
absorb water and electrolytes, form feces
