Optical Density Is a Numerical Calculation That Represents a Comparison

question 126

Multiple Choice

Optical density is a numerical calculation that represents a comparison of

• A)light entering an area on the film
• B)light leaving an area on the film
• C)the amount of energy needed to create the film image
• D)A and B
• E)A and C

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Definitions:

Periosteum

A thick layer of blood vessel-rich connective tissue that surrounds the bones, except where the joints are located.

Lacunae

Small cavities in bone or cartilage tissue that house cells (osteocytes, chondrocytes), providing them with space to reside and function.

Osteon

The spindle-shaped unit of bone composed of concentric layers of osteocytes organized around a central Haversian canal containing blood vessels and nerves.

Vertebrae

The series of small bones forming the backbone, in humans being 33 in number and providing support and flexibility.