Define the medical terms listed below: metatarsal—

Which chromosome carries the genes for the HLA system?

a. 1 b. 3 c. 6 d. 9

A left lateral chest projection with poor positioning demonstrates the humeri soft tissue superim-posed over the anterior lung apices. How was the patient positioned for such an image to be ob-tained?

a. The chest was rotated. b. The inferior midsagittal plane was tilted toward the IR. c. The humeri were positioned at a 90-degree angle with the body. d. The central ray was angled caudally.