Which of the following physician-office coding certifications requires at least three years of coding experience? 

A ________ sample of urine is the type of urine specimen most commonly collected

a. two-hour postprandial b. scheduled c. random d. weekly

In humans, the body systems interact with each other to maintain a stable internal environment. An example of this is the nervous system, which works with the cardiovascular system to maintain a steady blood pressure. The ability of an organism to adjust its physiologic processes to maintain a relatively stable internal environment is known as:

a. homeostasis. b. electrophysiology. c. metabolism. d. dependency.