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  • Question 1 - At rest, proton pumps are sequestered within the parietal cell in a series...

    Incorrect

    • At rest, proton pumps are sequestered within the parietal cell in a series of membrane compartments known as:

      Your Answer: Canaliculi

      Correct Answer: Tubulovesicles

      Explanation:

      The gastric H, K-ATPase pump, which pumps gastric acid (HCl), in the resting state is found in cytoplasmic tubular membranes. In the stimulated state this pump moves from the tubulovesicles to the apical membrane.

    • This question is part of the following fields:

      • Gastrointestinal
      • Medicine
      18.8
      Seconds

  • Question 2 - Chief cells secrete: ...

    Incorrect

    • Chief cells secrete:

      Your Answer: HCO3 and pepsinogen

      Correct Answer: Pepsinogen and gastric lipase

      Explanation:

      A gastric chief cell (or peptic cell, or gastric zymogenic cell) is a type of cell in the stomach that releases pepsinogen and gastric lipase.

    • This question is part of the following fields:

      • Gastrointestinal
      • Medicine
      14.2
      Seconds

  • Question 3 - Vagotomy leads to the following: ...

    Incorrect

    • Vagotomy leads to the following:

      Your Answer: Dysfunction of antegrade neurons

      Correct Answer: Irregular and chaotic peristalsis

      Explanation:

      The Vagus nerve is primarily responsible for autonomic regulation involved in heart, lung and gastrointestinal function. The gastric branches supply the stomach. The right branch joins the celiac plexus and supplies the intestines. Vagotomy involves cutting of the vagus nerve or its branches which is a now-obsolete therapy that was performed for peptic ulcer disease. Vagotomy causes a decrease in peristalsis and a change in the emptying patterns of the stomach.

    • This question is part of the following fields:

      • Gastrointestinal
      • Medicine
      12.2
      Seconds

  • Question 4 - The principal enzyme of lipid digestion is: ...

    Correct

    • The principal enzyme of lipid digestion is:

      Your Answer: Lipase

      Explanation:

      Lipase is the principle enzyme that digest lipids. Amylase digest carbohydrates. Colipase is a co-enzyme that optimize the activity of lipase. Trypsin digest proteins and cholesterol esterase digest cholesterol.

    • This question is part of the following fields:

      • Gastrointestinal
      • Medicine
      7.8
      Seconds

  • Question 5 - The hepatic portal vein: ...

    Incorrect

    • The hepatic portal vein:

      Your Answer: Responsible for venous drainage of the liver

      Correct Answer: Carries mainly nutrients from the GIT.

      Explanation:

      The portal vein contains oxygen as any other vein in the body does. The hepatic veins are responsible for venous drainage of the liver. The main function of the portal vein is to carry absorbed nutrients in the gut for metabolism and detoxification.

    • This question is part of the following fields:

      • Gastrointestinal
      • Medicine
      10.4
      Seconds

  • Question 6 - Which of the following substances inhibits pancreatic secretion? ...

    Incorrect

    • Which of the following substances inhibits pancreatic secretion?

      Your Answer: Acetylcholine

      Correct Answer: Pancreatic polypeptide

      Explanation:

      Number of hormones and neurotransmitters can stimulate and inhibit pancreatic exocrine secretion. Cholecystokinin, secretin, vasoactive intestinal peptide and substance P stimulate pancreatic secretion. Pancreatic polypeptide, somatostatin inhibit pancreatic secretion.

    • This question is part of the following fields:

      • Gastrointestinal
      • Medicine
      7.3
      Seconds

  • Question 7 - The transporter responsible for most glucose absorption in the lumen of the small...

    Incorrect

    • The transporter responsible for most glucose absorption in the lumen of the small intestine is called?

      Your Answer: GLUT 2

      Correct Answer: SGLT 1

      Explanation:

      GLUT = Glucose transporter. GLUT are a family of proteins of different types. GLUT 1 is mainly expressed in erythrocytes, whereas GLUT 2 is mainly expressed by, liver cells and renal tubular cells. GLUT 5 is a sucrose transporter in enterocytes. SGLT- Sodium-dependent glucose cotransporter or sodium-glucose linked transporter are a family of proteins of different types. SGLT1 transporter is found in the intestinal mucosa of the small intestine and SGLT2 in the proximal tubule of the nephron.

    • This question is part of the following fields:

      • Gastrointestinal
      • Medicine
      7.3
      Seconds

  • Question 8 - Pepsinogens are inactive pepsin precursors which are activated by ...

    Correct

    • Pepsinogens are inactive pepsin precursors which are activated by

      Your Answer: Gastric acid

      Explanation:

      Pepsinogen is converted to pepsin by the action of hydrochloric acid i.e. gastric acid

    • This question is part of the following fields:

      • Gastrointestinal
      • Medicine
      10.2
      Seconds

  • Question 9 - Normally the portal venous pressure is about: ...

    Incorrect

    • Normally the portal venous pressure is about:

      Your Answer: 100mmhg

      Correct Answer: 5mmhg

      Explanation:

      Under normal physiological conditions, the pressure in the portal vein, which carries blood from the gastrointestinal tract and spleen to the liver, typically ranges around 5-10 mmHg. Pressures significantly higher than this range can indicate portal hypertension, which can be associated with liver diseases such as cirrhosis.

    • This question is part of the following fields:

      • Gastrointestinal
      • Medicine
      5.5
      Seconds

  • Question 10 - Two types of gallstones are: ...

    Incorrect

    • Two types of gallstones are:

      Your Answer: Glycoproteins and phospholipids

      Correct Answer: Calcium and cholesterol

      Explanation:

      Cholesterol stones are the most common gallstones followed by calcium carbonate and bilirubinate.

    • This question is part of the following fields:

      • Gastrointestinal
      • Medicine
      7.1
      Seconds

SESSION STATS - PERFORMANCE PER SPECIALTY

Gastrointestinal (2/10) 20%
Medicine (2/10) 20%
Passmed
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