11- GI And GU Flashcards
Define Digestion
Breaking down of large food particles into molecules
Define absorption
Passage of molecules into blood and lymph
Alimentary Canal parts (GI Tract) (7)
- Mouth
- Pharynx
- Esophagus
- Stomach
- Small intestine
- Large intestine
- Anus
Accessory Organ parts (GI Tract) (6)
-Teeth
-Tongue
-Salivary glands
-Liver
Gall bladder
-Pancreas
What 2 reasons are food important
Nutrients- Building and repairing damaged tissues
Energy- Glucose (food)+O2=Energy
What are Gastoenterologists
Work on the Upper GI Tract
What are Proctologist’s
Work on the Lower GI Tract
Process of Digestion (6)
- Ingestion
- Secretion
- Mixing propulsion
- Mechanical and Chemical digestion
- Absorption
- Defecation
Mechanical digestion types (3)
- Mastication (chewing)
- Peristalsis (contraction and relaxation)
- Churning (stomach and small intestine)
Chemical digestion types (2)
- Series of catabolic reactions
- Bigger molecules break down into smaller molecules
Layers of GI tract (Outer to Inner)
Mesentary Serosa Muscularis Submucosa Mucosa
Role of the Peritoneum
Protect and encase organs
Role of the salivary glands (2)
Produce saliva
Start digestion
What system controls salivation
Autonomic nervous system
What drug blocks salivation
Atropine
Functions of the Esophagus
Pass food bolus to stomach by peristalsis
What controls esophageal peristalsis
Medulla Oblongata
How long does it take food to reach the stomach
4-8 seconds
Functions of the stomach (4)
- Mixing and holding food
- Begin protein digestion
- Continue triglyceride digestion
- Convert food bolus to chyme
Vomiting aka Emesiss
Forcible expulsion of Upper GI contents
What 2 things stimulate emesis
- Irritation and distention of stomach
- Unpleasant nerve impulses
What is a main function of the liver
Produce bile
What are the 2 functions of Bile
- Decrease surface tension of fat
- Mies fat to increase surface area
Function of the Gall Bladder
Stores and concentrates bile
What are 2 stool colors
Melena- Black (slow)
Hematochezia- Red (rapid)
What constitutes a positive tilt test
20 bpm increase
10 BP decrease
Ominous GI assessment findings
- Abdominal distention
- Cullens sign
- Grey-Turners sign