Nokea
Which is the possible cause of a urinary tract infection?
- A. bacteria in the urinary system
- B. calcium buildup in the kidney
- C. prostate enlargement
- D. kidney stones
Correct Answer: A
Rationale: Bacteria in the urinary system are the most common cause of urinary tract infections.
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Number of teeth which are monophyodont in man is-
- A. 4
- B. 22
- C. 32
- D. 12
Correct Answer: D
Rationale: Humans have 12 monophyodont teeth (premolars and molars), which erupt only once, unlike diphyodont teeth (incisors, canines) that replace milk teeth.
Homeostasis has 3 parts. What is the general term for the 1st?
- A. Controller
- B. Effector
- C. Receptor
- D. Transporter
Correct Answer: C
Rationale: Receptors detect changes in the internal environment as the first step in homeostasis.
Which of the following is a function of gall bladder?
- A. Deamination
- B. Bile storage
- C. Synthesis of plasma protein
- D. Storage of fat soluble vitamin
Correct Answer: B
Rationale: The gall bladder stores bile produced by the liver.
Following a diagnosis of Zollinger-Ellison syndrome, a 70-year-old woman undergoes gastrectomy. Her physician informs her that she will require lifelong intramuscular vitamin B12 injections. Which specific type of cells' absence is responsible for the need for vitamin replacement?
- A. Chief cells
- B. G cells
- C. Goblet cells
- D. Parietal cells
Correct Answer: D
Rationale: Parietal cells produce intrinsic factor, necessary for vitamin B12 absorption; their absence after gastrectomy necessitates B12 injections.
In which regions of the alimentary canal does amylase act?
- A. mouth cavity and pancreas
- B. mouth cavity and ileum
- C. stomach and pancreas
- D. stomach and ileum
Correct Answer: A
Rationale: Amylase acts in the mouth cavity and is also secreted by the pancreas into the duodenum.