PakQuizHub

1.Where is the intrinsic factor, essential for the absorption of vitamin B12, synthesized?

2.Peristalsis is characterized by the synchronized contraction and relaxation occurring where in relation to the food bolus?

Both above and below the food bolusOn the sides, lateral and medial, of the food bolusIn the dorsal and ventral regions surrounding the food bolusNone of the listed options

3.Which of the following substances is not secreted by enteroendocrine cells?

4.What is the primary physiological effect of Secretin?

Counteract stomach acidityStimulate pancreatic bicarbonate releaseReduce the production of gastric juicesInduce contraction of the pyloric sphincterEnhance bile secretion from the liver

5.Which of the following enzymes is NOT activated by trypsin?

ChymotrypsinogenPepsinogenProelastaseProcolipase

6.Which of the following bodily secretions is characterized by a significantly high pH level?

7.Which of the following reflexes is controlled by the vagus nerve?

Secretion of bile from the liverRelease of bicarbonate by the pancreasGastric secretion during the cephalic phaseProduction of mucus by Brunner’s glands

8.Which organ is responsible for releasing secretin?

9.What triggers peristaltic movement in the gastrointestinal tract?

Secretion of intestinal fluids before peristalsisMechanical stretching of the intestinal wallsCoordinated contraction of circular and longitudinal musclesInfluence from external nervous system

10.Which sugars are the end products present in intestinal chyme?

Glucose and fructoseRibose and mannoseRibose and xyluloseXylulose and fructose

11.Which of the following primarily controls the cephalic phase of gastric secretion?

12.What is the strongest trigger for the release of secretin?

Expansion of the intestinal wallsAcidic chyme entering the intestinePresence of proteinsFats in the digestive tract

13.What effect do cholagogues have on the gallbladder?

They stimulate the gallbladder to contractThey enhance the concentration of bileThey promote increased bile secretionThey encourage the bile to become more acidic

14.Which structure primarily regulates the peristaltic movements in the small intestine?

Myenteric plexusMeissner's plexusVagus nerveParasympathetic nervous system

15.Which type of gland in the stomach is responsible for the highest level of secretion?

16.Which of the following secretions is NOT influenced by vagal stimulation after eating?

Gastric secretionsPancreatic secretionsParotid gland secretionsBile release from the gallbladder

17.What triggers the activation of pepsinogen?

18.Which of the following statements accurately describe the pharyngeal phase of swallowing?

19.Where is bile synthesized in the body?

20.What is the primary role of hydrochloric acid in the stomach?

Killing harmful microorganismsBalancing the acidity of chymeConverting pepsinogen into its active formTriggering the release of pancreatic enzymes

Physiology Mcqs – MCQs