Skeletal Muscle Structure Duration: (3:34) User: greatpacificmedia - Added: 10/2

Question

Skeletal Muscle Structure Duration: (3:34) User: greatpacificmedia - Added: 10/24/09 Complete the following sentences based on the video above. 1. An individual muscle cell is called a 2. Each individual myofibril is surrounded by 3. Extension of the cell membrane, called tubules, come very close to portions of the sarcoplasmic reticulum. 4. Subunits of the myofibril are called 5. Accessory proteins, namely troponin and tropomyosin, crossbridges from prevent the connecting to filaments. of the thin

Explanation / Answer

ANS 1) An individual muscle cell is called the Myocyte

ANS 2) Each individual myofibril is surrounded by Endomysium

ANS 3) Extension of the cell membrane called T (Transverse) tubules, come very close to portions of the sacroplasmic recticulum.

ANS 4) Subunits of the myofibril are called Sarcomeres

ANS 5) Accesorry proteins, namely troponin and tropomyosin prevent the ATP crossbridges from connecting to Actin of the thin filaments.

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