HCl in stomach is the function of ___ cells that contain an enzyme called ___ that catalyzes the reaction between ______________ and water.
1. Chief; carbonic esterase; carbon dioxide
2. Parietal; carbohydrase; bicarbonate
3. Parietal; carbonic anhydrase; carbon dioxide
4. Goblet; carbonic anhydrase; bicarbonate

Subtopic:  Gastric Secretions |
 56%
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NEET 2025 - Target Batch
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Identify the incorrect statement:

1. Increasing acidity in the stomach stimulates endocrine cells in the gastric epithelium to produce somatostatin that inhibits further HCl secretion

2. HCl production increases in response to carbohydrates entering the stomach

3. HCl secretion is inhibited when acidity increases in the small intestine

4. Gastrin, histamine, and acetylcholine all act to increase HCl secretion

Subtopic:  Gastric Secretions |
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Enterokinase:

1. stimulates bicarbonate secretion by the pancreas
2. stimulates secretion of gastrin by the stomach
3. converts trypsinogen into trypsin
4. converts pepsinogen into pepsin

Subtopic:  Pancreatic Secretions |
 83%
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The large intestine functions in:
1. Bicarbonate secretion and bacterial action
2. Acid secretion and bacterial action
3. Water reabsorption and mass movements
4. Mixing action and intestinal hormone production

Subtopic:   DIGESTION OF FOOD |
 87%
From NCERT
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A common cause of peptic ulcer disease is:
1. Increased activity of the autonomic nervous system in persons with chronic stress
2. Infection of the stomach wall by Helicobacter pylori (a type of bacteria)
3. Consuming high levels of dairy products and hot, spicy foods
4. Increased production of hydrochloric acid (HCl) or gastrin by the stomach

Subtopic:  Disorders of Digestive System |
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NEET 2025 - Target Batch
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Identify the incorrect statement:
1. Constipation is caused by decreased motility in the large intestines
2. Diarrhea may result from decreased fluid absorption in the large intestines
3. A high intake of dietary fiber reduces the risk of constipation because it increases distension and motility in the large intestines
4. Bacterial diarrhea results from a bacterial toxin that blocks water channels in the cells of the large intestines

Subtopic:  Disorders of Digestive System |
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In the gastrointestinal tract, the layer of dense, irregular connective tissue or loose connective tissue that supports the mucosa, as well as joins the mucosa to the bulk of underlying smooth muscle and also contains blood vessels and a plexus is:

1. mucosa layer 2. submucosa layer
3. muscularis layer 4. serosa (adventitia layer)
Subtopic:  Histology of Gut |
 66%
From NCERT
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Which of the following is connected to the floor of the oral cavity by the frenulum?

1. oesophagus 2. muscles of mastication
3. lips 4. tongue
Subtopic:  Alimentary Canal: Oral Cavity & Teeth |
 90%
From NCERT
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The number of permanent and deciduous teeth in humans are respectively:
1. 36,36
2. 32,32
3. 32,20
4. 20,32

Subtopic:  Alimentary Canal: Oral Cavity & Teeth |
 75%
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The part in the center of a tooth made up of living connective tissue and having blood vessels and nerves is called:
1. enamel
2. pulp
3. cementum
4. dentin

Subtopic:  Alimentary Canal: Oral Cavity & Teeth |
 70%
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