The three systems that play roles in regulating acid-base balance of body fluids are the ________, ________, and ________

While listening to an otherwise healthy elderly patient's lungs, you note decreased breath sounds. Which of the following may explain this finding?

A) Previous abdominal injuries B) Decreased lung capacity C) Increased chest wall flexibility D) Decreased blood flow to the lungs

Drugs that cause paralysis of ciliary muscles, resulting in papillary dilation, are known as:

A. cholinergics B. spasmodics C. muscarinics D. cycloplegics (anticholinergic agents)