Where does the blood from most of the abdominal organs go before it enters the inferior vena cava? Why?

Claustrophobia is an example of a(n)

The amount of oxygen that is actually used by the body during the rest or a hand workout is determined by the heart rate, the stroke volume, and the amount of a. blood circulating in the vascular system b. oxygen removed from the vascular system c. oxygen provided to the vascular system d. blood that individual has in the body e. hemoglobin in the red blood cells

Which side effect should be assesed by the nurse when administering aminophylline?