A biologic reaction is produced by 4 Gyt of a test radiation. It takes 16 Gyt of 250-kVp x-rays to produce the same biologic reaction. What is the relative biologic effectiveness (RBE) of the test radiation?

The obliteration of tissue using electrosurgery, cryosurgery, laser or chemical treatment is called surgical:

A) destruction. B) excision. C) fusion. D) incision.

Distribution of a poisonous substance in the body occurs primarily through the:

a. lymphatic system. b. circulatory system. c. endocrine system. d. gastrointestinal system.