Answer the following statement(s) true (T) or false (F)

1. Extensibility refers to the ability of a muscle to stretch.
2. A dark band formed by parallel thick filaments that partly overlap the thin filaments is known as an H band.
3. The sarcoplasmic reticulum is the smooth endoplasmic reticulum of a muscle fiber.
4. Clinically, dystrophin is the most important noncontractile protein to occur in muscle fibers.
5. A deficiency of acetylcholine receptors leads to muscle paralysis in myasthenia gravis.


1. True
2. False
3. True
4. True
5. True

Anatomy & Physiology

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