Nokea
What is the main role of the hepatic portal system?
- A. Regulating blood glucose levels through the release of insulin
- B. Supplying oxygen to the liver for metabolic processes
- C. Eliminating toxins from the bloodstream
- D. Filtering and processing nutrients absorbed from the gastrointestinal tract
Correct Answer: D
Rationale: The hepatic portal system transports nutrient-rich blood from the GI tract to the liver for processing and detoxification before entering systemic circulation.
You may also like to solve these questions
Enzyme maltase in human gut acts on food at a pH of -
- A. More than 7 to change starch into maltose.
- B. Less than 7 to change starch into maltose.
- C. More than 7 to change maltose into glucose.
- D. Less than 7 to change maltose into glucose.
Correct Answer: C
Rationale: Maltase works in the small intestine (pH > 7) to convert maltose into glucose.
Which vitamin is produced by intestinal bacteria?
- A. B12
- B. A
- C. C
- D. D
Correct Answer: A
Rationale: Intestinal bacteria synthesize vitamin B12, which is absorbed in the ileum with intrinsic factor. Vitamins A, C, and D are not produced by gut bacteria.
About nasopharynx all true except:
- A. Lined by pseudostratified epith.
- B. Contain pharyngeal tonsil.
- C. Contain palatine tonsil
- D. Follow nasal cavity.
Correct Answer: C
Rationale: The nasopharynx is lined by pseudostratified ciliated epithelium and contains the pharyngeal tonsil (adenoids), but the palatine tonsils are located in the oropharynx, not the nasopharynx.
The enzyme_________________________________ is made by the pancreas and breaks longer amino acid chains into short amino acid chains.
- A. secretin
- B. pepsin
- C. erepsins
- D. trypsin
Correct Answer: D
Rationale: Trypsin, secreted by the pancreas, breaks down larger polypeptides into shorter peptide chains during protein digestion.
Which element in the molecule of urea shows that it is formed from amino acids and not from glucose?
- A. carbon
- B. hydrogen
- C. nitrogen
- D. oxygen
Correct Answer: C
Rationale: Nitrogen is a key component of amino acids and is retained in urea during deamination.