Question | Answer |
What happens if you lose the enteric nervous system? | no propulsion of materials in GI tract -random contractions |
Where does tonic inhibition occur? | sphincters |
What does delayed emptying cause? | nausea, vomiting, bloating and heart burn |
What is rapid emptying? | diarrhea (osmotic and secretory) |
What is secretory diarrhea? | cholera - infection, upsets ion balance across the gut |
What does the digestive system provide to the body? | nutrients, water and solutes |
What are the four basic functions of the GI tract & accessory glands? | fragmentation, digestion, secretion, and absorption |
What is osmotic diarrhea? | ex - lactose intolerant - missing lactase results in lactose being delivered to the colon, no glucose transporter in colon, so material sits in colon, pulls water into colon - diarrhea |
Which part of the GI tract are passive conduits/ | esophagus and anus |
Which part of the GI tract is a secretory organ? | stomach |
Which part of the GI tract is absorptive? | intestines |
Which type of diarrhea is isoosmotic? | all kinds of diarrhea are isoosmotic - 300mOsm |
What is the concentration of NaCl in secretory diarrhea? | 300 mOsm |
What is the concentration of NaCLl in osmotic diarrhea? | less than 300 mOsm - glucose adds to concentration |
Will sever diarrhea result in metabolic acidosis or metabolic alkalosis? | metabolic acidosis |
What is the best way to rehydrate someone who has severe diarrhea? | salt solution containing rice (polymers of glucose) |
What does increased gastrin do to secretin? | increased secretin |