What is the purpose of a prefix in a medical term?

The exchange of oxygen and carbon dioxide occurs in which part of the lungs?

Which type of fracture involves a bone breaking into many fragments?

A radiographic examination of the breasts using X-rays is a:

Which condition is a sexually transmitted infection caused by the bacterium *Treponema pallidum*?

A procedure that uses shock waves to break up kidney stones is:

A renal infarction occurs when part of the tissue undergoes necrosis after cessation of the blood supply, usually as a result of artery occlusion. Renal function is usually normal. 

Renal infarction may result from all of the following except

Place in order the following structures of the abdomen ranging from hypoechoic to echogenic. Liver Cortex of the kidney Sinus of the kidney Pancreas

Which one of the following clinical findings is the most likely reason for a renal artery duplex examination?