You are called for a 48-year-old man who is complaining of back and leg pain. Your assessment shows that he pain and tenderness in his lower back with tingling through his left buttock and down his left leg. He tells you that he has been moving furniture. You should suspect:

Common reality is defined as:

A) one person's perception of his or her surroundings. B) a perceived thought that is not based on reality. C) minimal shared reality between two individuals. D) sensory stimulation that can be confirmed by others.

Normal air is approximately ________ oxygen and ________ nitrogen.

A. 95%/5% B. 21%/78% C. 50%/50% D. 1%/99%