GI 12 Flashcards
Where does most of the fluid that enters the GI tract come from?
The GI tract itself
Where does most of the fluid in the GI tract go?
It is reabsorbed and only a small amount is excreted
What are the major producers of secretions in the GI tract?
- Salivary glands
- Liver
- Pancreas
What are the components of salivary secretion?
- Water (98%)
- Electrolytes
- Mucus
- Enzymes
- Immune modulators
What does the Water, Mucus and Electrolytes do in saliva?
Protects the oral cavity and makes food easier to swallow
What are examples of the immune modulators found in saliva?
- Antibacterial antibodies
* WBCs
What does Salivary amylase do?
Initiate carbohydrate digestion
How are Salivary secretions regulates?
They are primarily a cephalic phase response so the brain integrates responses
What neurotransmitter, viscosity and role of saliva when activated by the sympathetic nervous system?
- Norepinephrine
- Respiration
- Thicker
What neurotransmitter, viscosity and role of saliva when activated by the parasympathetic nervous system?
- Watery
- Digestion
- Acetylcholine
