Question

multiple choice question

muscles attach to bones by

• striations.
• sphincters.
• myofibril.
• tendons.

Explanation:

Analyze the question stem

The question asks how skeletal muscles attach to bones.

Evaluate the options

• striations: These are the alternating light and dark bands visible under a microscope in skeletal and cardiac muscle tissue, representing the sarcomere arrangement. They do not attach muscle to bone.
• sphincters: Using the Sphincter Muscles knowledge point, we know these are circular muscles that constrict or dilate a passage or orifice. They do not serve as attachment structures to bones.
• myofibril: This is a basic rod-like unit of a muscle cell (muscle fiber) containing myofilaments. It is an internal cellular structure, not an attachment tissue.
• tendons: These are tough bands of fibrous connective tissue that connect muscle to bone, capable of withstanding tension.

Determine the correct answer

Based on anatomical definitions, tendons are the structures that attach muscles to bones.

Answer:

• striations.
• sphincters.
• myofibril.
• tendons. (Correct answer)