PIR ________ good for muscles in spasm

The principal mechanism of action of phenytoin (Dilantin) in treating status seizures is the:

A) blocking of GABA receptor sites to prevent further cellular activity in the CNS. B) influx of calcium ions through calcium channels to enhance depolarization. C) blocking of acetylcholine receptor sites at the neuromuscular junction to prevent convulsions. D) prevention of sodium ions entering the cell by closing sodium channels.

Which marking indicates a search is presently under way in a particular room?

a. a diagonal slash b. an S c. an X d. a circle