digestive system Flashcards
what is the visceral peritoneum?
The serous membrane that covers the organs
what is the partial peritoneum?
the serous membrane that lines the wall of the abdominal cavity
what is mastication?
chewing
what breaks down starch in the mouth?
salivary amylase
Which parts of the pharynx function in digestion?
oropharynx and laryngopharynx
The laryngopharynx carries food directly to the?
esophagus
where is the esophagus located?
mediastinum
what is the folds of mucous membrane within the lining of the stomach that allow for stretching of the stomach?
rugae
Stomach movements that combine ingested materials and stomach secretions to form chyme are what kind of waves?
mixing waves
stomach movements that force chyme toward the pyloric sphincter are what kind of waves?
peristaltic
3 sections of the small intestine in order from stomach to large intestine
duodenum, jejunum, and ileum
small intestine secretes what two enzymes?
peptidase and disaccharidases
what are the types of movements that occur within the small intestine?
peristaltic and segmental contractions
The region of the large intestine located at the proximal end, where the large intestine meets the small intestine, is the?
cecum
Identify the substances absorbed by the large intestine
Vitamin K, salt, and water
what is mechanical digestion
breaks down larger food particles into smaller ones
what is chemical digestion?
uses enzymes to break covalent chemical bonds in organic molecules
Identify the components of pancreatic juice
- enzymes to digest lipids
- enzymes to digest carbohydrates
- enzymes to digest proteins
- enzymes to digest nucleic acids
- bicarbonate ions
Enzymes produced at the microvilli of the small intestine that break the peptide bonds in proteins to form amino acids are called
peptidase
When chyme is dilute, water will?
be absorbed across the intestinal epithelium
Identify the enzymes that aid in the chemical digestion of carbohydrates
Disaccharidases
Amylase
When chyme is concentrated, water will?
move into the lumen of the small intestine