Question 1

Which of the following best describes the primary function of the mucus layer in the stomach lining?

Accepted Answer

To protect the stomach epithelium from acid and digestive enzymes.

Question 2

A patient presents with burning stomach pain, black tarry stools, and vomiting blood. Which digestive malfunction is most likely responsible for these symptoms?

Accepted Answer

Gastric Ulcer

Question 3

Which bacterium is most commonly associated with the development of gastric ulcers due to its ability to survive in acidic conditions and damage epithelial cells?

Accepted Answer

Helicobacter pylori

Question 4

A patient taking non-steroidal anti-inflammatory drugs (NSAIDs) for chronic pain develops a gastric ulcer. What is the most likely mechanism by which NSAIDs contribute to ulcer formation?

Accepted Answer

NSAIDs reduce the production of protective mucus in the stomach lining.

Question 5

Which of the following is a severe complication of a gastric ulcer that requires immediate medical attention?

Accepted Answer

Perforation of the stomach wall

Question 6

In Irritable Bowel Syndrome (IBS), what is the physiological cause of diarrhea?

Accepted Answer

Too fast peristalsis in the large intestine

Question 7

Which of the following triggers is LEAST likely to cause a flare-up of IBS symptoms?

Accepted Answer

Consuming gluten in a person without coeliac disease

Question 8

A patient with coeliac disease consumes gluten. What is the most direct effect on their small intestine?

Accepted Answer

Destruction of the villi by the immune system

Question 9

Which of the following symptoms is most specifically associated with malabsorption in coeliac disease?

Accepted Answer

Fatty stools (steatorrhoea)

Question 10

A child is introduced to gluten-containing foods before three months of age. According to current research, what is the potential risk?

Accepted Answer

Increased risk of developing coeliac disease

Question 11

Which of the following best explains why a person with coeliac disease may experience weight loss?

Accepted Answer

Reduced absorption of nutrients due to damaged villi

Question 12

Which of the following is a common misconception about the cause of IBS?

Accepted Answer

IBS is caused by an autoimmune attack on the intestines.

Question 13

Which of the following best describes the role of bicarbonate ions ($$\mathrm{$$HCO_3$$^-}) in $$the stomach?

Accepted Answer

They neutralize acid near the stomach epithelium.

Question 14

A patient with IBS experiences alternating episodes of diarrhea and constipation. What is the underlying physiological explanation for this pattern?

Accepted Answer

Fluctuating rates of peristalsis in the large intestine

Question 15

Which of the following genetic factors is associated with an increased risk of developing coeliac disease?

Accepted Answer

Mutation in the HLA-DQ gene

Question 16

A patient with a history of gastric ulcers is advised to avoid NSAIDs. Which equation best represents the chemical neutralization of stomach acid by bicarbonate ions?

Accepted Answer

$$\mathrm{HCl + $$NaHCO_3$$ \rightarrow NaCl + H_2O + CO_2$}$$

Question 17

Which of the following is NOT a typical symptom of IBS?

Accepted Answer

Vomiting blood

Question 18

Which of the following best explains why a person with a perforated gastric ulcer may experience sudden severe abdominal pain?

Accepted Answer

Acid and digestive enzymes leak into the abdominal cavity, irritating the peritoneum.

Question 19

Which of the following best describes the difference between the pathophysiology of coeliac disease and IBS?

Accepted Answer

Coeliac disease is an autoimmune disorder causing villi destruction, while IBS involves abnormal muscle contractions and sensitivity.

Question 20

A patient with coeliac disease is found to have steatorrhoea. What is the most likely explanation for this finding?

Accepted Answer

Decreased absorption of fats due to damaged villi

Digestive Malfunctions: Gastric Ulcers, Irritable Bowel Syndrome, and Coeliac Disease

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