AFK practice: Biomedical sciences

Questions

1. 1.
   Which nerve provides motor innervation to the mylohyoid muscle?
2. 2.
   Immediately after an inferior alveolar nerve block, a patient cannot close the eyelid on the injected side and the corner of the mouth droops. Into which…
3. 3.
   Which step in collagen synthesis requires ascorbic acid (vitamin C) as a cofactor?
4. 4.
   Dental stone (alpha-hemihydrate) is stronger than dental plaster (beta-hemihydrate) mainly because stone:
5. 5.
   A dentist chooses a conventional glass ionomer cement to restore root-surface lesions in a patient with xerostomia. Its chemical adhesion to tooth structure…
6. 6.
   Below approximately which plaque-fluid pH does the oral environment become undersaturated with respect to enamel hydroxyapatite, favouring demineralization?
7. 7.
   A 3-year-old has rapidly progressing caries on the maxillary primary incisors and a history of frequent sugary bottle feeds. Which organism is most strongly…
8. 8.
   Which of the following is a site of endochondral (cartilaginous) growth in the cranial base?
9. 9.
   Which enamel structures are incremental growth lines that appear on the tooth surface as perikymata?
10. 10.
    In the coronal pulp, which zone lies immediately beneath the odontoblast layer and is relatively poor in cells?
11. 11.
    A dental assistant develops itchy, eczematous lesions on the backs of both hands about 48 hours after wearing gloves; patch testing is positive for rubber…
12. 12.
    A clinic monitors its steam autoclave weekly with a biological indicator. Spores of which organism are used for this purpose?
13. 13.
    A newborn has a unilateral cleft of the upper lip. Failure of fusion between which embryonic structures produced this defect?
14. 14.
    In humans, as the rate of salivary flow increases, what happens to the sodium concentration of the saliva?
15. 15.
    A local anesthetic injected near an acute periapical abscess gives poor anesthesia. Which explanation is most appropriate?