Question 122 (part 2) · LDEK · Etiology and pathogenesis of caries
Choose true statements:
1) risk of caries increases with not stimulated low salivary secretion, which is associated with the removal rate of eliminating the carbohydrates from oral cavity;
2) myeloperoxidase and peroxidase are enzymes synthesized by vesicular cells of salivary glands, they are characterized by double mechanism of action: antibacterial and neutralizing hydrogen peroxide;
3) dominant buffering system of saliva are inorganic phosphates, with less important bicarbonates and proteins;
4) very low stimulated secretion is observed at the secretion rate below 0,7 ml/min;
5) statherin and anionic proteins rich in proline determine, apart from calcium and fluoride, remineralizable saliva properties.
Correct answer is:
2) myeloperoxidase and peroxidase are enzymes synthesized by vesicular cells of salivary glands, they are characterized by double mechanism of action: antibacterial and neutralizing hydrogen peroxide;
3) dominant buffering system of saliva are inorganic phosphates, with less important bicarbonates and proteins;
4) very low stimulated secretion is observed at the secretion rate below 0,7 ml/min;
5) statherin and anionic proteins rich in proline determine, apart from calcium and fluoride, remineralizable saliva properties.
Correct answer is:
- A. 1,2.
- B. 2,3,4.
- C. 4,5.
- D. 1,2,5.
- E. 1,4.
Hint
Check where each salivary peroxidase is produced and which buffer system dominates in saliva; then recall the cut-off values for stimulated flow.
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