00
Correct
00
Incorrect
00 : 00 : 00
Session Time
00 : 00
Average Question Time ( Secs)
Retry this test Dashboard

  • Question 1 - The ATPase of parietal cells moves: ...

    Correct

    • The ATPase of parietal cells moves:

      Your Answer: H+ into the gastric lumen in exchange for a k+

      Explanation:

      ATPase of the parietal cell is also known as the proton pump, which moves H+ ions into the gastric lumen in exchange for K+ ions into the cell.

    • This question is part of the following fields:

      • Gastrointestinal
      • Medicine
      13.3
      Seconds

  • Question 2 - VIP, GIP and somatostatin play an inhibitory role in gastric acid secretion by...

    Correct

    • VIP, GIP and somatostatin play an inhibitory role in gastric acid secretion by inactivating?

      Your Answer: G cells

      Explanation:

      Gastrin is secreted from the G cells. VIP, GIP and somatostatin all inhibit acid production by inhibiting the G cells.

    • This question is part of the following fields:

      • Gastrointestinal
      • Medicine
      17.6
      Seconds

  • Question 3 - A patient with achalasia ...

    Incorrect

    • A patient with achalasia

      Your Answer: None are correct

      Correct Answer: Has decreased production of vasoactive intestinal polypeptide (VIP)

      Explanation:

      Oesophageal achalasia is an oesophageal motility disorder involving the smooth muscle layer of the oesophagus and the lower oesophageal sphincter (LES). It is characterized by incomplete LES relaxation, increased LES tone, and lack of peristalsis of the oesophagus (inability of smooth muscle to move food down the oesophagus) in the absence of other explanations like cancer or fibrosis. In achalasia, there is loss of nitric oxide (NO) and vasoactive intestinal polypeptide (VIP) releasing inhibitory neurons.

    • This question is part of the following fields:

      • Gastrointestinal
      • Medicine
      43.3
      Seconds

  • Question 4 - Which enzyme facilitates the function of pancreatic lipase by increasing exposure of its...

    Correct

    • Which enzyme facilitates the function of pancreatic lipase by increasing exposure of its active site?

      Your Answer: Colipase

      Explanation:

      Colipase is a co enzyme that optimize the activity of lipase by facilitating the exposure of its active sites.

    • This question is part of the following fields:

      • Gastrointestinal
      • Medicine
      18.3
      Seconds

  • Question 5 - Gastrin activates all of the following cells except: ...

    Incorrect

    • Gastrin activates all of the following cells except:

      Your Answer: Stomach smooth muscle

      Correct Answer: Mucus neck cells

      Explanation:

      The G cell is a type of cell in the stomach and duodenum that secretes gastrin. It works in conjunction with gastric chief cells and parietal cells. G cells are found deep within the pyloric glands of the stomach antrum, and occasionally in the pancreas and duodenum. Gastrin-releasing peptide, as well as the presence of amino acids in the stomach, stimulates the release of gastrin from the G cells. Gastrin stimulates enterochromaffin-like cells to secrete histamine. Gastrin also targets parietal cells by increasing the amount of histamine and the direct stimulation by gastrin, causing the parietal cells to increase HCl secretion in the stomach.

    • This question is part of the following fields:

      • Gastrointestinal
      • Medicine
      16
      Seconds

  • Question 6 - The cells that secrete pepsinogen and gastric lipase are found in which part...

    Correct

    • The cells that secrete pepsinogen and gastric lipase are found in which part of the stomach?

      Your Answer: Body and fundus

      Explanation:

      Stomach can be divided in to different regions. Cardia, fundus, body, antrum and pylorus from proximal end to distal end respectively. Cells that secret the inactive form of pepsin or pepsinogen are chief cells and are abundant in the body (corpus) and the fundus region of the stomach.

    • This question is part of the following fields:

      • Gastrointestinal
      • Medicine
      19.2
      Seconds

  • Question 7 - Which pair is correct concerning enteroendocrine cells in the GIT mucosa and their...

    Correct

    • Which pair is correct concerning enteroendocrine cells in the GIT mucosa and their products?

      Your Answer: D cells and somatostatin

      Explanation:

      Somatostatin, an inhibitory hormone is secreted form the D cells of the Pancreatic Islets.

    • This question is part of the following fields:

      • Gastrointestinal
      • Medicine
      22
      Seconds

  • Question 8 - 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
      18
      Seconds

  • Question 9 - Dietary starch is mainly: ...

    Correct

    • Dietary starch is mainly:

      Your Answer: Amylopectin

      Explanation:

      Dietary starch consists of two types of molecules: the linear and helical amylose and the branched amylopectin. Starch generally contains 20 to 25% amylose and 75 to 80% amylopectin by weight but depends in the plant. Glycogen, the glucose store of animals, is a more branched version of amylopectin.

    • This question is part of the following fields:

      • Gastrointestinal
      • Medicine
      3.4
      Seconds

  • Question 10 - Acetylcholine from enteric nerve endings stimulates this pair: ...

    Correct

    • Acetylcholine from enteric nerve endings stimulates this pair:

      Your Answer: Parietal cells and chief cells

      Explanation:

      In the body of the stomach, the vagal postganglionic muscarinic nerves release acetylcholine(ACh) which stimulates parietal cell H+ secretion. Gastric chief cells are primarily activated by ACh. However the decrease in pH caused by activation of parietal cells further activates gastric chief cells.

    • This question is part of the following fields:

      • Gastrointestinal
      • Medicine
      19.9
      Seconds

SESSION STATS - PERFORMANCE PER SPECIALTY

Gastrointestinal (8/10) 80%
Medicine (8/10) 80%
Passmed
Retry this test Dashboard