Regulation of Gut Motility Functions Quiz

What initiates the basic electrical rhythm (BER) in the gastrointestinal tract?

Where are the cells of Cajal located in the stomach and small intestine?

What is the role of spike potentials superimposed on the depolarizing portions of the BER waves?

What ion is responsible for the depolarizing portion of spike potentials in the gastrointestinal tract?

In what part of the gastrointestinal tract does the BER rarely cause muscle contraction?

Which region of the gastrointestinal tract exhibits a descending gradient in pacemaker frequency?

What happens to gastric secretion, bile flow, and pancreatic secretion during each MMC?

What occurs when a meal is ingested in relation to motilin secretion and MMC?

What is the role of erythromycin in gastrointestinal motility?

What triggers receptive relaxation in the stomach?

How does the stomach accommodate food upon entry?

What initiates peristaltic waves in the stomach after food entry?

What is the primary function of the colon in relation to fluid absorption?

What is the role of the ileocecal valve in the digestive process?

What happens when peristaltic waves reach the ileocecal valve?

Which reflex is responsible for increasing passage through the ileocecal valve when food leaves the stomach?

What is a common feature between segmentation contractions in the colon and small intestine?

What is the function of antiperistalsis occasionally seen in the colon?

What is the main physiological mechanism through which fats, carbohydrates, and acid in the duodenum inhibit gastric acid and pepsin secretion?

Which hormone has been identified as possibly being the messenger involved in inhibiting gastric acid and pepsin secretion in the duodenum?

What is the role of CCK in gut motility?

What initiates the process of vomiting?

Why does the glottis close during vomiting?

Which region of the brain contains the 'vomiting center' responsible for controlling different components of the vomiting act?

What initiates the defecation reflex?

How does the frequency of the wave in the colon change along its length?

How long does it take for the first remnants of a meal to reach the terminal part of the colon?

What percentage of small colored beads fed with a meal are typically recovered in the stool after 72 hours?

What does monitoring a pill containing sensors and a miniature radio transmitter allow observation of within the gastrointestinal tract?

What type of contraction occurs exclusively in the colon?

What is the function of motilin during the MMC?

How does erythromycin impact gastrointestinal motility?

What initiates peristalsis in the lower portion of the stomach?

Which compound may have therapeutic value in patients with decreased gastrointestinal motility?

What occurs in the stomach during receptive relaxation?

Which process is suppressed during a meal ingestion?

What initiates the basic electrical rhythm (BER) in the gastrointestinal tract?

What ions are responsible for the depolarizing and repolarizing portions of spike potentials in the gastrointestinal tract?

Where are the cells of Cajal primarily located in the stomach and small intestine?

What role do neurotransmitters play in affecting the BER in the gastrointestinal tract?

What is the main function of spike potentials superimposed on the BER waves in the gastrointestinal tract?

What effect does the location of interstitial cells of Cajal have on pacemaker frequency in the gastrointestinal tract?

What is the primary function of peptide YY in the gastrointestinal system?

Which of the following statements about vomiting is true?

What is the role of CCK in relation to gastric emptying?

Which of the following does NOT occur during the process of vomiting?

What triggers the sensation of nausea before vomiting occurs?

Which part of the brain contains the 'vomiting center' that controls different components of the vomiting act?

What is the main purpose of slowing motility in the colon?

What is the function of the ileocecal valve in relation to the colon and ileum?

What physiological mechanism facilitates absorption in the colon?

What initiates the gastro-ileal reflex leading to an increased flow through the ileocecal valve?

What type of waves propel the contents of the colon towards the rectum?

Which segmental contractions promote mixing and absorption in the colon?

What type of contraction occurs exclusively in the colon?

What initiates the defecation reflex?

Which part of the colon has the highest frequency of contraction waves per minute?

What is the average transit time for the first remnants of a meal to reach the terminal part of the colon?

How long does it typically take for total recovery of small colored beads fed with a meal in the stool?

What allows observation of transit time, pressure fluctuations, and pH changes in the gastrointestinal tract?

What is the main purpose of segmentation in the intestines?

Which neurotransmitter is responsible for producing relaxation ahead of the stimulus in the intestines?

What describes the motility pattern related to peristalsis that retards movement of intestinal contents?

Which neurotransmitter activates sensory neurons that activate the myenteric plexus?

What is the primary function of cholinergic neurons passing in a retrograde direction in the myenteric plexus?

Which type of contraction occurs routinely in the setting of segmentation in the intestines?

What is the primary function of motilin during the MMC?

What triggers receptive relaxation in the stomach?

Which compound may have therapeutic value in patients with decreased gastrointestinal motility?

What effect does a meal ingestion have on secretion of motilin and the MMC?

What initiates peristaltic waves in the stomach after food entry?

What is the role of the ileocecal valve in the digestive process?

What is the primary function of peptide YY in the gastrointestinal system?

Which part of the brain contains the 'vomiting center' responsible for controlling different components of the vomiting act?

What initiates the process of vomiting?

Why does the glottis close during vomiting?

What is an example of central regulation of gut motility functions?

Which messenger is probably involved in inhibiting gastric acid and pepsin secretion and gastric motility in the duodenum?

Which area of the brain is responsible for initiating vomiting in response to certain chemical agents?

What type of receptors in the small intestine trigger impulses that lead to vomiting?

What is the role of ondansetron and haloperidol in treating vomiting?

Which of the following is a condition where lesions of the area postrema decrease vomiting?

What is the primary function of serotonin (5-HT) released from enterochromaffin cells in the small intestine?

In which part of the brain are dopamine D2 receptors and 5-HT3 receptors primarily located?

What is the function of peristalsis in the small intestine?

Which muscle contractions are initiated by focal increases in Ca2+ influx in the small intestine?

What is the main function of the colon in relation to meal residues?

What is the average frequency of BER cycles/min in the distal ileum of the small intestine?

How do segmentation contractions in the small intestine affect chyme?

What is the impact of tonic contractions on transit time in the small intestine?