GI Pathologies Flashcards
PART 1
PART 1
What is the function of the GI System?
Process ingested food by mechanical and chemical means, extract nutrients and excrete the waste products.
The GI is divided into an upper and lower GI, what makes up these parts?
Upper GI
-mouth, esophagus, stomach (storage function), and duodenum (digestive function)
Lower GI
-small and large intestine
- What is the function of the small intestine?
- What is the function of the large intestine?
- Digestion and absorption of nutrients.
- Water and electrolyte absorption, stores waste products until elimination.
From the mouth to anus, the GI tract has what 4 layers?
- Mucosa (epithelial spuamos or columnar)
- Submucosa (accessory glands, lymphoid tissue, blood vessels, nervous tissue)
- Muscularis (longitudinal and circular smooth muscles)
- Serosa (outer most layer)
The GI tract is _____ to the external environment (at both ends) and is populated by billions of ________ in a symbiotic state (altered normal flora leads to disease).
- open
- bacteria
The intestinal tract provides a ___________ barrier for ________ function. Breach of this _________ barrier leaves the host susceptible to disease.
- physical
- immune
- mucosal
The mouth is involved in what functions?
- Mastication
- Initiates Digestion (amylase)
- Mucus Production (moistens food, cleans the mouth, salivary glands)
What is located behind the mouth and what are the 3 regions?
Pharynx
- nasopharynx
- oropharynx
- laryngopharynx
The esophagus is a __________ tube that connects the _______ with the _________. It lies behind the _______ and ______ and in front of the spine.
- muscular
- throat (pharynx) with the stomach
- trachea and heart
What is peristalsis?
Involuntary constriction and relaxation of the muscles of the intestine, creating wave-like movements that push the contents of the canal forward.
The stomach is a muscular hollow organ that has what functions?
- Storage
- Digestion (mucus, enzymes gastrin and pepsin, hydrochloric acid)
- Parietal cells function?
- Chief cells function?
-G cells produce ___________ and chief cells produce _________ which aid in __________ in the stomach.
- Produce HCl and intrinsic factor for RBC synthesis.
- Synthesize pepsinogen
-gastrin, pepsinogen (pepsin), digestion
The contents of the stomach are called _____ and the __________ sphinicter opens to allow gastric emptying into the ________ intestine.
- chyme
- pyloric
- small
- What is gastric emptying?
- How long can gastric emptying take?
- The time it takes food to empty from the stomach to the small intestine.
- 40 minutes to a few hours.
What are the 3 parts of the small intestine?
- Duodenum
- Jejunum
- Ileum
The small intestine has a ___________ and ____________ function.
- Digestive (bile, pancreatic juices, proteins, fats, and carbs)
- Absorption (lacteals, weight loss surgery)
Digestion primarily takes place in the ___________. It is facilitated by the presence of ______ which emulsify fats and cause them to be easily digested. It is also facilitated through __________ juices that can help degrade proteins, fats and carbs.
- SI
- bile
- pancreatic
Absorption takes place in the ______________. It involves _________ which are lymphatic capillaries that absorb dietary fats in the villi of the SI and facilitate the transportation of digested fats from the villi of the SI.
- SI
- lacteals
PART 2
PART 2
What is malabsorption syndrome?
Group of disorders characterized by reduced intestinal absorption of dietary components and excessive loss of nutrients in the stool.
Malabsorption Syndrome is associated with what?
- muscle weakness, muscle wasting, paresthesias
- numbness and tingling; neuro damage
- bone pain, fractures, skeletal deformities
- edema (protein deficiency)
The ___________ is the last part of the GI tract and functions to absorb _______ and store the remaining waste.
- Large Intestine
- water
________ Disease is a chronic lifelong inflammatory bowel disease that can affect any segment of the intestinal tract. The current treatment is directed toward symptomatic relief and control of the disease process.
-Crohn’s Disease