MCQOPTIONS
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MCQOPTIONS
This section includes 190 Mcqs, each offering curated multiple-choice questions to sharpen your Uncategorized topics knowledge and support exam preparation. Choose a topic below to get started.
| 151. |
Pancreatic secretion is inhibited by all the followings except: |
| A. | Somatostatin |
| B. | Glucagon |
| C. | Acid in the duodenum |
| D. | Sympathetic stimulation. |
| Answer» D. Sympathetic stimulation. | |
| 152. |
Liver functions include all the followings except: |
| A. | Excretion of bile. |
| B. | Glycogenolysis |
| C. | Glycogenesis. |
| D. | Formation of essential amino acids. |
| Answer» E. | |
| 153. |
Removal of the entire colon would be expected to cause: |
| A. | Megaloblstic anemia. |
| B. | Severe malnutrition. |
| C. | Decrease urinary urobilinogen. |
| D. | Death. |
| Answer» D. Death. | |
| 154. |
All of the following statements are untrue except: |
| A. | Peptic ulcers can be treated by anticholinesterase drugs. |
| B. | gastric secretion in response to hypoglycemia is due to gastrin. |
| C. | Peptic ulcers tend to heal by removal of the pyloric antrum. |
| D. | Vomiting occurs more by smooth muscle than by skeletal muscle activity. |
| Answer» D. Vomiting occurs more by smooth muscle than by skeletal muscle activity. | |
| 155. |
All the following statements about pancreatic secretion are true except : |
| A. | The intestinal phase is the main phase of pancreatic secretion . |
| B. | Gastro-pancreatic reflex stimulates pancreatic secretion . |
| C. | Failure of both pancreatic and biliary secretions is needed before steatorrhea develops . |
| D. | none |
| Answer» D. none | |
| 156. |
The main function of the cardiac sphincter of the stomach is to: |
| A. | Prevent the reflux of the gastric contetnt to the esophagus |
| B. | Facilitate storage of food on the lower part of the esophagus |
| C. | Mix the food particles entering the stomach. |
| D. | Control the rate of food entry into the stomach. |
| Answer» B. Facilitate storage of food on the lower part of the esophagus | |
| 157. |
A 45 years old man is found to have a condition in which the parietal cells of his stomach have been destroyed by an autoimmune mechanism. This condition is often associated with which of the following?: |
| A. | Prenicious anaemia. |
| B. | Gastric ulcerarion |
| C. | Steatorrhea. |
| D. | Protein deficiency. |
| Answer» B. Gastric ulcerarion | |
| 158. |
Removal of the stomach can lead to all of the following except: |
| A. | Marked digestive disturbances |
| B. | Megaloblastic anaemia (pernicious anaemia) |
| C. | A fall in the plasma volume after a heavy meal (due to the dumping syndrome) |
| D. | Diminished Ca absorption and weak development of bones |
| Answer» B. Megaloblastic anaemia (pernicious anaemia) | |
| 159. |
HCL secretion in the stomach: |
| A. | Is a function of peptic cells. |
| B. | Require no energy. |
| C. | Occurs by passive diffusion of both H+ and CLin the gastric human. |
| D. | Require presence of carbonic anhydrase enzyme. |
| Answer» E. | |
| 160. |
The stomach is a poor area for absorption primarily because: |
| A. | Most foods are swallowed before ptyalin has a chance to breakdown starch |
| B. | pH of the stomach is too high |
| C. | The junction between epithelial cells presents wide space for fluid/ion movement |
| D. | The stomach lacks villous membranes. |
| Answer» E. | |
| 161. |
The normally innervated stomach (True or False): |
| A. | Is stimulated to secrete gastric juice when food is chewed, even if it s not swallowed |
| B. | Can`t secrete HCL when its H histamine receptors are blocked |
| C. | the denervated stomach can secrete gastric juice after a meal is ingested. |
| D. | Empties more quickly than the denervated stomach. |
| Answer» B. Can`t secrete HCL when its H histamine receptors are blocked | |
| 162. |
The salivary secretion (true or false)? |
| A. | Has a serous component. |
| B. | Has a mucous component. |
| C. | A and B are correct. |
| D. | It is largely under hormonal control. |
| Answer» D. It is largely under hormonal control. | |
| 163. |
Intestinal proteolysis is caused by the followings except: |
| A. | Trypsin. |
| B. | Carboxypeptidase. |
| C. | Chymotrypsin. |
| D. | Pepsin. |
| Answer» E. | |
| 164. |
The salivary secretion: |
| A. | Is stimulated by most GIT hormones specially gastrin. |
| B. | I s essential for complete digestion of starch. |
| C. | Increases more by sweet than by bitter substances. |
| D. | Markedly Increases by parasympathetic stimulatation. |
| Answer» E. | |
| 165. |
HCl secretion includes all the following processes except: |
| A. | Active transport of H into gastric lumen |
| B. | H is exchanged for K from the extracellular fluid |
| C. | HCO diffuse into the extracellular fluid in exchange for Cl |
| D. | It s associated with production of a postprandial alkaline tide |
| Answer» C. HCO diffuse into the extracellular fluid in exchange for Cl | |
| 166. |
The following stimulate pancreatic secretion rich in enzymes and poor in HCO except: |
| A. | CCK |
| B. | Gatrin |
| C. | Secretin |
| D. | Vagal stimulation |
| Answer» D. Vagal stimulation | |
| 167. |
The intestinal brush border help digestion by the followings except: |
| A. | Facilitating movements of intestinal content. |
| B. | Supplying digestive enzymes and special transport system. |
| C. | Increasing surface area of intestinal mucosa |
| D. | none |
| Answer» B. Supplying digestive enzymes and special transport system. | |
| 168. |
Cholera toxins cause diarrhea by: |
| A. | Activation of calcium activated C1 channels in the cells of intestinal crypts. |
| B. | Activation of cAMP-activated C1- channels. |
| C. | Activation of both Ca++ activated and cAMP- activated C1- channels. |
| D. | none |
| Answer» C. Activation of both Ca++ activated and cAMP- activated C1- channels. | |
| 169. |
All the following statements about esophagus are true except: |
| A. | UES is a true sphincter. |
| B. | Gastrin increases tone of LES. |
| C. | LES contracts during Swallowing . |
| D. | none |
| Answer» D. none | |
| 170. |
Gall bladder bile is characterized by all the followings except: |
| A. | It is relatively acidic |
| B. | Darker in color. |
| C. | More inorganic constituent. |
| D. | Higher specific gravity. |
| Answer» D. Higher specific gravity. | |
| 171. |
Small intestine motility is stimulated by the following except: |
| A. | Gastrin |
| B. | CCK |
| C. | Secretin |
| D. | Motilin. |
| Answer» D. Motilin. | |
| 172. |
In contrast to Secondary esophageal peristalsis,primary esophageal peristalsis characterized by which of the following statements? |
| A. | It does not involve relaxation of The lower esophageal sphincter. |
| B. | It involves only contraction of esophageal smooth muscle. |
| C. | It is not influenced by intrinsic nervous system. |
| D. | It has an oropharyngeal phase. |
| Answer» E. | |
| 173. |
Small intestine motility is inhibited by the following except: |
| A. | Somatostatin. |
| B. | VIP. |
| C. | Adrenaline |
| D. | Insulin. |
| Answer» E. | |
| 174. |
Which of the following hormones is involved in the initiation of the migrating motor comples?: |
| A. | Gastrin |
| B. | Motilin |
| C. | Secretin |
| D. | Cholecystokinin |
| Answer» C. Secretin | |
| 175. |
Motility of small intestine is inhibited by the following except: |
| A. | Intestino-intestinal reflex |
| B. | Vesico-intestinal reflex. |
| C. | Peritoneal irritation |
| D. | Distention of stomach. |
| Answer» E. | |
| 176. |
Which of the following statement about motor function of stomach is untrue?: |
| A. | The frequency of gastric peristaltic contraction is about 3/min |
| B. | Fasting hypoglycemia produces hunger contractions |
| C. | The enterogastric reflex stimulates gastric emptying |
| D. | none |
| Answer» D. none | |
| 177. |
The volume of succus entericus per day is about: |
| A. | 0.6L. |
| B. | 2L. |
| C. | 3L. |
| D. | none |
| Answer» C. 3L. | |
| 178. |
Lactase enzyme splits lactose into: |
| A. | Glucose. |
| B. | Glucose and galactose. |
| C. | Glucose and fructose. |
| D. | none |
| Answer» C. Glucose and fructose. | |
| 179. |
Digestion of proteins by succus entericus enzymes includes all the following enzymes except: |
| A. | Aminopeptidase. |
| B. | Carboxypeptidase. |
| C. | Nucleases. |
| D. | Dipeptidase. |
| Answer» D. Dipeptidase. | |
| 180. |
Enteric lipase splits neutral fat into: |
| A. | Fatty acid and glycerol. |
| B. | Fatty acid glycerol and monoglycerides. |
| C. | Monoglycerides. |
| D. | none |
| Answer» C. Monoglycerides. | |
| 181. |
The extracellular enzyme in succus entericus is: |
| A. | Dipeptidase. |
| B. | Entericlipase. |
| C. | Lactase. |
| D. | Enterokinase. |
| Answer» E. | |
| 182. |
The main mechamism of succus entericus secretion is: |
| A. | Vagal stimulation. |
| B. | CCK. |
| C. | Secretin |
| D. | Local axon reflex |
| Answer» E. | |
| 183. |
VitaminC is absorped from small intestine by: |
| A. | Passive diffusion. |
| B. | Na+ dependant 2ry active transport. |
| C. | 1ry active transport. |
| D. | none |
| Answer» C. 1ry active transport. | |
| 184. |
Peristaltic contractions of small intestine are characterized by all of the followings except: |
| A. | They are myogenic |
| B. | They are due to local axon reflex |
| C. | They are stimulated by gastro-enteric reflex |
| D. | none |
| Answer» B. They are due to local axon reflex | |
| 185. |
Peristaltic rush are characterized by the following except: |
| A. | They are strong peristaltic contraction. |
| B. | They occur normally. |
| C. | they occur when there is intense irritation or distention of the small intestine. |
| D. | They are intiated by reflexes involving the intrinsic and extrinsic nerves. |
| Answer» C. they occur when there is intense irritation or distention of the small intestine. | |
| 186. |
The following reflexes inhibit small intestine motility except: |
| A. | Peritoneo-intestinal |
| B. | Reno-intestinal |
| C. | Gastro-ileal. |
| D. | Somato-intestinal. |
| Answer» D. Somato-intestinal. | |
| 187. |
Peristaltic waves in the small intestine are characterized by the following statement except: |
| A. | They occur in response to distention of the wall. |
| B. | Can be abolished by local application of coccaine |
| C. | They are controlled primarily by extrinsic innervation |
| D. | none |
| Answer» D. none | |
| 188. |
Rhythmic segmentation of small intestine is characterized by the following except: |
| A. | It is due to local axon reflex. |
| B. | It is myogenic. |
| C. | Its frequency is determined by BER. |
| D. | Its main function is to mix chyme with the digestive juice. |
| Answer» B. It is myogenic. | |
| 189. |
Migration motor complex is characterized by the following except: |
| A. | It starts in the stomach and spread to terminal ilium. |
| B. | Occurs every1-1.5h. |
| C. | It helps digestion of food |
| D. | It prevents duodeno-gastric reflux. |
| Answer» D. It prevents duodeno-gastric reflux. | |
| 190. |
The followings are true statements about absorption from small intestine except: |
| A. | Fructose is absorbed by facilitated diffusion. |
| B. | Glucose is absorbed by Na+ dependent 2ry active transport. |
| C. | Vit. B12 is absorbed by diffusion |
| D. | none |
| Answer» D. none | |