Nokea
If an incision had to be made in the small intestine to remove an obstruction, which tunica would be cut first?
- A. muscularis
- B. mucosa
- C. submucosa
- D. serosa
Correct Answer: D
Rationale: The serosa is the outermost layer of the small intestine and would be the first layer cut during surgery.
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Which structure helps to prevent a bolus of food from entering the trachea during deglutition (swallowing)?
- A. collagen
- B. cardiac sphincter
- C. larynx
- D. epiglottis
Correct Answer: D
Rationale: The epiglottis is a flap of cartilage that covers the trachea during swallowing, preventing food from entering the airway.
Fully digested food reaches to liver by
- A. Hepatic portal vein
- B. Hepatic artery
- C. Hepatic vein
- D. All the above
Correct Answer: A
Rationale: Nutrients from digested food reach the liver via the hepatic portal vein.
The absorption of fructose by intestinal mucosa is
- A. Co-transport mechanism
- B. Simple diffusion
- C. Facilitated transport
- D. Active transport
Correct Answer: C
Rationale: Fructose is absorbed via facilitated transport through GLUT5 transporters in the intestinal mucosa.
Succus entericus is secreted by-
- A. Gastric glands
- B. Islets of Langerhans
- C. Crypts of Lieberkuhn & Brunner's gland
- D. Goblet cells
Correct Answer: C
Rationale: Succus entericus is secreted by Crypts of Lieberkuhn and Brunner's glands.
Ventral [lower] surface of hard palate is covered by:
- A. Pseudo stratifies columnar epith.
- B. Stratified squamous keratinized (parakeratinized).
- C. Stratified squamous non keratinized.
- D. Transitional epith.
Correct Answer: B
Rationale: The ventral surface of the hard palate is covered by stratified squamous epithelium that is keratinized (often parakeratinized) to withstand mechanical stress from food. Pseudostratified columnar epithelium is found in respiratory regions, not here.