What Does the Term Extrinsic Refer to in Regards to Muscle

Question

What does the term extrinsic refer to in regards to muscle?
A) Extrinsic describes a muscle that has an origin and insertion located in the same body region.
B) Extrinsic describes a muscle that has an origin and insertion located in different body regions.
C) Extrinsic describes the attachment of a muscle to the bone or structure that does not move when the muscle contracts.
D) Extrinsic describes the attachment of a muscle to the bone or structure that does move when the muscle contracts.

Accepted Answer

The origin is the attachment of a muscle to the bone or structure that does not move when the muscle contracts. Insertion is the attachment of a muscle to the bone or structure that does move when the muscle contracts. An intrinsic muscle is a muscle that has an origin and insertion located in the same body region. An extrinsic muscle is a muscle that has an origin located in a different body region than its insertion.