A group of similar, specialized cells that perform a special function are called:

Which of the following terms is used for metabolism?

a. biotransformation b. excretion c. liberation d. elimination

What is the instructional note found under the category code for pervasive developmental disorders?

A) Use additional code to identify any associated medical condition and mental retardation. B) Note: Codes within this category may be used regardless of the patient's age. C) Excludes 2: Habitual excessive use of alcohol. D) Code first any associated physical or developmental disabilities.