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GI Phys Revision - Statistics
General Stats
- This quiz has been taken 16 times
- The average score is 51 of 60
Answer Stats
| Question | Answer | % Correct |
|---|---|---|
| Acid secretion in the stomach is primarily stimulated by which neurotransmitter? | Acetylcholine | 100%
|
| Which hormone is known to inhibit gastric secretions? | CCK | 100%
|
| Which cells in the stomach secrete pepsinogen? | Chief cells | 100%
|
| What triggers the cephalic phase of digestion? | CNS responses to smell, taste, and thought | 100%
|
| What does the ileo-caecal sphincter prevent? | Colonic flora reflux into the ileum | 100%
|
| What is the function of bile salts? | Emulsify lipids | 100%
|
| Which enzyme converts trypsinogen to trypsin? | Enterokinase | 100%
|
| Chewing primarily serves to: | Form a bolus from food | 100%
|
| Which of the following substances is secreted into the bloodstream by G cells? | Gastrin | 100%
|
| What is a function of fiber in the diet? | It adds bulk to stool | 100%
|
| CCK is primarily released in response to: | Lipids and carbohydrates | 100%
|
| What initiates the migrating myoelectric complex during fasting? | Motilin | 100%
|
| Where does carbohydrate digestion begin? | Mouth | 100%
|
| The motility of the large intestine is regulated by: | Neural reflexes and intrinsic mechanisms | 100%
|
| Which component of pancreatic secretions digests fats? | Pancreatic lipase | 100%
|
| Which enzyme is secreted by the pancreas for fat digestion? | Pancreatic lipase | 100%
|
| What role does bicarbonate (HCO3-) play in the stomach? | Protects the mucosa by increasing pH | 100%
|
| What physiological changes occur during vomiting? | Relaxation of both oesophageal sphincters | 100%
|
| What enzyme is secreted by the parotid gland to begin starch digestion? | Salivary amylase | 100%
|
| Which hormones are released during the intestinal phase to inhibit stomach activity? | Secretin, CCK, and GIP | 100%
|
| Emulsification of fats occurs in the: | Small intestine | 100%
|
| Where does protein digestion begin? | Stomach | 100%
|
| What is the role of the gallbladder in digestion? | Stores and concentrates bile | 100%
|
| Chylomicrons travel through the lymphatic system to: | The thoracic duct | 100%
|
| What happens to triglycerides after they are absorbed into enterocytes? | They are converted into chylomicrons | 100%
|
| Which nerve primarily stimulates gastric secretions through ACh? | Vagus nerve | 100%
|
| Intrinsic factor is crucial for the absorption of which vitamin? | Vitamin B12 | 100%
|
| Which cranial nerves are involved in salivation? | V, VII, IX, X | 100%
|
| What is the primary function of the large intestine? | Water and ion reabsorption | 100%
|
| What is the basic electrical rhythm (BER) in the stomach? | An electrical current regulating motility | 89%
|
| The swallowing reflex involves which of the following actions? | Closure of the vocal cords | 89%
|
| The secretion of HCO3- from duct cells of the pancreas is stimulated by: | Decreased duodenal pH | 89%
|
| What effect does gastrin have in the stomach? | Increases pepsinogen release | 89%
|
| What happens to gastrin production during the intestinal phase? | It decreases | 89%
|
| Which of the following statements about the pyloric sphincter is true? | It regulates the release of small amounts of chyme | 89%
|
| What enzyme is activated from pepsinogen in the stomach? | Pepsin | 89%
|
| What is the primary effect of secretin on pancreatic secretions? | Promotes bicarbonate release | 89%
|
| Glycemic index measures: | The speed and height of blood glucose rise | 89%
|
| The medullary central trigger zone is primarily involved in: | Vomiting | 89%
|
| What type of carbohydrates are broken down into monosaccharides at the brush border? | All of the above | 78%
|
| Which part of the intestine is primarily responsible for digestion? | Duodenum | 78%
|
| During the oropharyngeal phase of swallowing, which structure blocks aspiration of the bolus? | Epiglottis | 78%
|
| Which hormone promotes triglyceride synthesis in adipose tissue? | Insulin | 78%
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| What enzyme converts chylomicrons into fatty acids in the cell? | Lipoprotein lipase | 78%
|
| Stretch receptors in the rectum are responsible for: | Relaxing the inner sphincter and contracting the outer sphincter | 78%
|
| Which factor does NOT affect glucose absorption? | Water intake | 78%
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| What is the primary function of lingual lipase found in saliva? | Begins the digestion of fats | 67%
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| Which reflex involves the distension of one section of the colon relaxing another? | Colono-colonic reflex | 67%
|
| Which of the following is NOT a function of the liver regarding amino acids? | Direct absorption into the bloodstream | 67%
|
| What happens to the rectum during the process of defecation? | It is normally empty | 67%
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| What type of enzyme is pepsin? | Endopeptidase | 56%
|
| What is the primary effect of deep inspiration during vomiting? | Facilitates the expulsion of gastric contents | 56%
|
| The relaxation of the upper esophageal sphincter (UES) occurs during: | The pharyngeal phase of swallowing | 56%
|
| What allows oligopeptides to be absorbed across the enterocyte intact? | Transcytosis | 56%
|
| Soluble fiber can make the gastrointestinal tract: | Viscous | 56%
|
| Which monosaccharide is absorbed via facilitated diffusion? | Fructose | 44%
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| Hormone-sensitive lipase is activated by: | Glucagon and epinephrine | 44%
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| After absorption, amino acids can be converted into all of the following EXCEPT: | Insulin | 44%
|
| Which transporter is responsible for glucose and galactose absorption? | SGLT | 33%
|
| What transports amino acids into enterocytes? | Both A and B | 22%
|
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