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24 Cards in this Set
- Front
- Back
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Label pict
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pg 159 slide 2
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Ingestion
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taking food into mouth
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mechanical digestion
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physical breakdown
mastication (chewing) segmentation: mixing and churning in small intestine |
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Chemical digestion
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molecules broken down by enzymes
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Propulsion
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peristalsis: muscular contraction that moves food through GI tact
** NOT digestion type |
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secretion
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production and release of bile, enzymes, etc
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absorption
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nutrient transport into blood/lymph vessels
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elimination of wastes
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defecation of feces
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peristalsis
*form of __ *involves the cont/relax of __ in the __ *it __ break up food |
*propulsion
*smooth muscle; alimentary canal *does not |
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Segmentation
*local contractions of __ *involved with __ *mixes food with ___ |
*smooth muscles
*mechanical digestion *digestive juices |
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Histology
*4 layers |
*musosa closest to lumen, secretion and absorbtion
*submucosa- vascularized and innervated *muscularis- inner circular and outer longitudinal layers of muscle, segmentation and peristalsis *serosa- visceral peritoneum |
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what keeps you from swallowing your tongue?
oral cavity is initial location of |
lingual frenulum
mechanical and chemical digestion |
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lips consist of __
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non-keratinized stratified squamous epithelium
PROTECTS! |
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Tooth Structure review pic?
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page 161 slide 3
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__ primary teeth aka __ teeth
inciors? canines? molars? |
20
8 4 8 |
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__ permanent teeth
incisors? canines? premolars? molars? |
32
8 4 8 12 |
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pharynx: oropharynx and laryngopharynx
*function *made of *no ____ |
passagway for food fluid and air
swallowing, stratified squamous nasopharynx in digetive system. |
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3 phases of swallowing
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1. voluntary phase- bolus of food pushed by tongue against hard palate
2. pharyngeal phase - involuntary. bolus moves to oropharynx. uvula closes nasopharynx and epiglottis cover larynx 3. esophageal phase- involuntary. perstalic contractions push bolus to stomach. prior structure return to their pre-swallow positions |
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Esophagus
*__ tube *__ swallowed food to stomach *opening in diaphragm __ *circular muscle where esophagus and stomach meet |
*muscular
*propels *esophageal hiatus *cardiac sphincter |
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Reflux Esophagitis
*AKA __ *__ regurgitate into esophagus *risk factors *symptoms |
*heartburn
*acidic stomach contents *obesity, smoking, types or quantity of food, bulimia *abdm pain, difficulty swallow, incrsd belching, bleeding |
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Stomach
*mucosa is __ *functions (3) |
*simple columnar epith.
*storage of food, mech. digestion (churn food with gastric juices), chemical digestions (intiate protein digestion) *limited absorption |
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label pic 164 slide 1
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yeah
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Histology of stomach wall
1. surface mucous cells 2. mucous neck cells 3. Parietal Cells 4. Chief Cells 5. Enteroendocrine cells |
1. Mucin secretion to protect stomach lining
2. Acidic mucin secretion to maintain acidic conditions 3. HCL secretion, gastirc intrinsic factor secretion (binds to b12 assistingin absorbtion. hyposec. leads to prenicious anemia) 4. secrete pepsinogen. acid activates into pepsin. digests protein 5. hormone secretion. gastrin and somatostatin |
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Peptic Ulcer
*__ of stomach or duodenal __ *__ diagnosed each year *may be caused by ___ *associated with ___ *___ ulcer *treatments |
*erosion; mucosa
*4 mil Americans *ibuprofen asprin use *Helicobacter pylori *perforating ulcer (eroded through whole wall, emergency) *antibiotics, neutralizing acids (Tums, rolaids) |
