Flashcards in Final Exam GI Physiology: Motility of Ruminant GI Tract Deck (11)
What is RGR?
Reticular Groove Reflex- the formation of a groove from the esophagus to the abomasum
Since RGR is a reflex, what is the stimuli?
Sight and smell
Na+ and Cu+ salts
How long does it take to complete the ruminoreticular cycle?
What are the 5 steps in the ruminoreticular cycle?
1. Primary reticular depolarization and contraction
2. Partial reticular relaxation
3. Secondary reticular depolarization and contraction
4. Primary RUMINAL depolarization and contraction
5. Secondary RUMINAL depolarization and contraction
Ingesta are separated by density because of the ruminoreticular cycle. What is the most dorsal ingesta? What is kept afloat?
Gas is most dorsal
Solid forage is kept afloat
What are the 4 distinct phases of Rumination?
Reinsalivation is achieved through secretions by what gland?
The Parotid Gland
The Parotid Gland produces _________ HCO3- and _______ PO4-2 during reinsalivation.
Eructation is a vagovagal reflex. What does it accomplish?
Pushes gas from rumen into esophagus and promotes reverse peristalsis
Extrinsic control of ruminant GI tract motility is controlled by the _______.