Gastrointestinal Textbook Information Flashcards
(233 cards)
What is the primary function of the GI tract?
Digestion and absorption of nutrients
Since the gastrointestinal has an extensive surface area, what does it function mean?
It’s the major means of exchange between human organisms and the environment
What are some basic functions of the GI tract? (5)
Absorbs nutrients necessary to maintain metabolic processes and support growth & development
Aids with waste products
Fluid and electrolyte balance
Barrier to protect against bacteria
Provides detoxification while other routes may be immature in a child
What are the 3 steps on digestion?
- Digestion
- Absorption
- Metabolism
What are these 3 steps used for?
To help convert outside nutrients into nutrients the body can use
There are 2 forms of digestion which are?
Mechanical and chemical
What does mechanical digestion do?
When the bodies muscles and neuromuscular system helps aid and move food along the GI tract
Otherwise known as churn food
What does chemical digestion do?
Body uses cells and glands to help soften the food
Otherwise known as saliva and hydrochloric acid
Where does mechanical and chemical digestion start?
And provide example of how it helps us?
In the mouth
Mechanical - chewing & moving
Chemical - saliva
After the body does the mechanical movement of chewing and food and the chemical movement of soften it with saliva what is the next step?
Swallowing
What is another word for swallowing?
Deglutition
Swallowing/deglutition is important for the body what?
To pass food down safely into the esophagus and later into the stomach
What’s one super important thing to know about swallowing?
It’s voluntary
What is swallowing voluntary?
Because kids sometimes don’t want to eat something so they spit it right back out
However once it’s passed down the throat, further down into the GI tract, is this ability voluntary?
Nope
What does peristalsis mean?
Wavelike movement that helps squeeze food along the entire length of the alimentary tract
Moves food through the esophagus and lower esophageal spincter relaxes the food and enters the stomach
So it goes through the esophagus into the lower esophagus sphincter, which during this time is relaxed
What do you think happens once it enters the stomach, to the lower esophagus sphincter
And why do you think that?
It closes
To avoid causing the food to go back up
So the stomach breakdown the food obviously into small partials and watery secretions ( chyme )
What is the next step?
Go into small intestine or liver
So let’s say it goes into the liver, what is helping it breakdown?
The bile
Let’s say it goes into the pancreas, what is helping it breakdown?
Insulin
Where is the main site of absorption?
Large intestine
Assessment of gastrointestinal function!
What are some common consequences of GI disease ?
Malabsorption
Fluid and electrolytes
Malnutrition
Poor growth
What are the 4 most important things that a nurse should do in her assessment of the GI?
Height & weight
Intake and output
Abdominal examination
Simple stool and urine tests