Gastrointestinal Physiology Quiz

A 45 year old woman presents with dysphagia (difficulty in swallowing) for solid foods and liquids. A barium swallow reveals dilation of the proximal esophagus, and a beak-like tapering of the distal esophagus. You correctly diagnosis achalasia and fully expect to see all of the following characteristics EXCEPT:

Which of the following secretagogues or conditions is most likely to stimulate the secretion of cholecystokinin (CCK) from the duodenal mucosa?

What is the most common type of motility associated with the descending colon?

You have sat down to a scrumptious meal consisting of a spinach salad, a juicy piece of very lean filet mignion (16 oz.), a baked potato with generous gobs of butter and sour cream, and a fine glass of a robust wine. Which of the following represents the BEST order in which the above items are sequentially emptied from the stomach?

Myenteric oscillation potentials are characterized as__________ slow waves which are ____________ likely to generate spontaneous action potentials.

Below is a list of events that occur during the act of vomiting.

1. the LES and UES are open
2. forced inspiration against a closed glottis
3. reverse peristalsis from the mid small intestine
4. the LES is open and the UES is closed
5. relaxation of the pyloric sphincter
6. forceful contractions of the stomach

Indicate the correct sequence of events involved in the act of vomiting

Which gastrointestinal function IS NOT caused by cholecystokinin?

Which of the following IS NOT a function of hepatocytes?

Which cells type is PROPERLY matched with its secretion?

Which gland/organ is best represented from the above graph?

By which mechanism of action does Cimetidine inhibit gastric acid secretion?

How does the autonomic nervous system affect salivary secretory rate?

The transport of which substance IS NOT Na+-dependant?

Which bond is cleaved by the action of isomaltase?

Excessive absorption of which substance is responsible for hemochromatosis?

A 38 year old male walks into your office complaining of abdominal pain. An upper GI series revealed the presence of a gastric ulcer. Gastrin levels are 74 pg/ml (normal range is 50 to 150 pg/ml). Hydrochloric acid levels are 2mmoles/hr (normal range is 1 to 5 mmoles/hr). Blood analysis reveals elevated levels of macrophages and other immunocytes. From the given information, this individual is most likely suffering from ___________ which is best treated with__________.