Nokea
Large, insoluble molecules have to be digested before they can be
- A. absorbed.
- B. assimilated.
- C. egested.
- D. ingested.
Correct Answer: A
Rationale: Large molecules must be broken down into smaller, soluble units before they can be absorbed across the intestinal lining.
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All about Striated ducts is true EXCEPT:
- A. Are ion transporting cells
- B. Present in all salivary glands
- C. Present in exocrine portion of pancreas
- D. Show basal acidophilic striations.
Correct Answer: C
Rationale: Striated ducts are found in salivary glands, not the exocrine pancreas, which has intercalated ducts instead.
Which of the following structures is a common passageway for both food and air?
- A. Nasopharynx
- B. Oropharynx
- C. Esophagus
- D. Trachea
Correct Answer: B
Rationale: The oropharynx serves as a common pathway for food (to the esophagus) and air (to the laryngopharynx and trachea), unlike the other options.
What is the major function of the podocyte?
- A. To keep large molecules out of the nephron
- B. To strengthen the glomerular capillaries
- C. To act as macrophages in the kidney
- D. To detect chemical changes in the blood
Correct Answer: A
Rationale: Podocytes form a filtration barrier in Bowman's capsule, preventing large molecules from entering the filtrate.
Which of the following enzymes formed in the pancreas aids in protein digestion?
- A. Amylase
- B. Lipase
- C. Trypsinogen
- D. Trypsin
Correct Answer: D
Rationale: Trypsin, activated from trypsinogen, is a pancreatic enzyme that digests proteins.
The crypts of Lieberkuhn secrete :
- A. Gastrin
- B. Rennin
- C. Cholecystokinin
- D. Succus entericus
Correct Answer: D
Rationale: Crypts of Lieberkuhn secrete succus entericus (intestinal juice) for digestion in the small intestine.