225.Which of the following is the action of styloglossus?

1.Acts to protrude the tongue and retract tip of tongue.
2.Acts to pull sides of tongue downward and aids retrusion.
3.Acts to draw up the tongue to create a trough for
swallowing.
4.Flattens and broadens tongue.


Ans:3.Acts to draw up the tongue to create a trough for
swallowing.

224.Vertebral artery is the branch of:

1.Thyrocervical trunk.
2.First branch of the subclavian artery.
3.Second branch of the subclavian artery.
4.Inferior thyroid artery.

Ans:2.First branch of the subclavian artery.

Explanation:ref gray's anatomy pg928

223.Which material listed below has historically been the retrofilling material of choice?

a.Composite
b.Zinc-free amalgam
c.Gutta-percha
d. Methyl methacrylate

Ans.b.Zinc-free amalgam

Explanation:A retrofilling (also called a reverse filling or retrograde amalgam filling) is placed to seal the apical
portion of the root canal. This procedure is used when an apicoectom y alone will not yield a good
result. Whenever there is any chance whatsoever that an apical seal may be faulty, a reverse filling
material must be placed.