Which term describes a large rounded projection on bone that may be roughened?

• A. Tuberosity
• B. Crest
• C. Trochanter
• D. Process

Answer: (A)

A tuberosity is a large rounded projection on a bone that often has a roughened surface where muscles attach, making the texture grip the muscle fibers better. This matches the description of a big rounded bump that can be rough. For example, the deltoid tuberosity on the humerus is a classic site where the deltoid muscle attaches and the surface is roughened to secure the connection.

A crest is a narrow, thin ridge along a bone, not a rounded bump. A trochanter is a very large projection on the femur, typically blunt and rough but not described as a rounded lump in the same sense. A process is any projection and doesn’t specify the rounded, roughened characteristic.