GI Flashcards
What is propulsion along GI tract called
Peristalsis
Main function of GI tract
Supply nutrients to body cells
Taking food and moving it along the GI tract
Ingestion&Propulsion
Breakdown of food
Digestion
Transfer of food products into circulation
Absorption
Excreting the waste products of digestion
Elimination
How long is the GI tract? From where to where ?
30 feet
Mouth to anus
4 layers of entire GI tract
Mucous
Submucosa
Muscle
Serosa
What does Parasympathetic NS do when dealing with GI
Excitatory
What does sympathetic NS do when dealing with GI
Inhibitory
What in the GI tract sends signals to the ANS
Sensory fibers
Peristalsis in increased by _________ and decreased by __________ stimulation
Increased by parasympathetic and decreased by sympathetic
What is the enteric nervous system also known as
GUT BRAIN
Numerous neurons control movement and secretion of the GI tract
Enteric Nervous System (GI tract “nervous system”)
How much cardiac output does the GI tract receive
25-30%
The GI tract is a network of circulation connected to what 3 things
Vena cava
Spleen
Liver
A large amount if blood supply is diverted from the digestive system when?
During exercise/stress
What is mixing and propulsion called
Peristalsis
What does not have any enzymes or hormones in it
Esophagus
What are the 3 secretions of the GI tract
- enzymes and hormones for digestion
- mucus for protection and lubrication
- water and electrolytes
Peritonitis is an ___________
Emergency
Lines the abdominal cavity wall
Parietal
Covers the abdominal organs
Visceral
Space between the parietal and visceral layers
Peritoneal cavity