Oral Esophageal Physiology Flashcards
Deglutition is what?
Swallowing
Odynophagia is what?
Painful swallowing
What is a test to measure pressure in the GI tract?
Manometry
Which Salivary gland produces all serous fluid?
All mucous fluid?
Mixed?
Serous = Parotid Mucous = Sublingual Mixed = Submandibular
What is the difference in ionic concentrations of Fast vs. Slow saliva production?
Fast = Like plasma, high HCO3- and NaCl Slow = Very Hypotonic, High K, low NaCl and HCO3-
Parasympathetic stimulation of saliva glands acts through which ganglia?
Otic –> Parotid gland
Submandibular –> Sublingual and Submandibular Glands
Which NT’s are released by the parasympathetic nervous system and what is there effect on saliva?
ACh and VIP
Watery saliva due to vasodilation
Increases HCO3-
Sympathetic NT’s on saliva and what do they do?
NE/Epi
Viscous saliva due to vasoconstriction
Stimulate myobroblast contraction
Taste receptors use what type of 2nd messenger?
GPCR
What is the digestive function of the nasopharnyx/soft palate?
Close off nasal passage and prevent bolus from entering the nasal cavity
What is the digestive function of the oropharynx?
Contract to propel the bolus
What happens to the laryngopharynx during swallowing?
Relaxes to segregate food and air
What happens to the UES and LES when bolus is present in the esophagus?
Both are closed
What muscle relaxes to allow UES to open?
Cricopharngeal Muscle
Afferent signals from the esophagus travel in which nerves?
CN9 and CN10 (Glossopharyngeal and Vagus nerves)