Which of the following are costs whose total does not change in proportion to the activity of the dental practice?

A car strikes a tree causing the passenger to strike his forehead against the dashboard. After the impact, the brain bounces back and forth within the skull. Based on the anatomy and physiology of the skull, which one of the following is TRUE?

A) The frontal bone is the thinnest portion of the skull and most easily fractured. B) The brain will not be injured since the flexibility of the skull will absorb the force of the impact. C) The brain will not be injured unless an object on the dashboard penetrates the skull. D) The ridges of the basilar skull can injure the brain as it moves back and forth.

The ____________________ method of typing for RhD must be performed using a heated light box.

Fill in the blank(s) with the appropriate word(s).