Multiple Choice
The diagram below shows some of the muscles used for chewing. Using your knowledge of the bones, identify the insertion of the masseter.
10. Muscles
Origin and Insertion
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The attachment site of a muscle's tendon to the more-movable bone is called the __________.
A
belly
B
proximal end
C
insertion
D
origin
E
distal end
Verified step by step guidance1
Understand the basic anatomy of a muscle: Muscles are attached to bones by tendons, and they have two main points of attachment - the origin and the insertion.
Define the term 'origin': The origin is the attachment site of a muscle's tendon to the less-movable bone, typically located closer to the center of the body.
Define the term 'insertion': The insertion is the attachment site of a muscle's tendon to the more-movable bone, usually located further from the center of the body.
Differentiate between 'origin' and 'insertion': While the origin remains relatively stationary during muscle contraction, the insertion moves as the muscle contracts.
Apply the definitions to the problem: Since the problem asks for the attachment site to the more-movable bone, the correct term is 'insertion'.
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