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WebAnatomy - Muscular System

1. The troponin and tropomyosin system is bound to actin molecules. True False  2. The troponin and tropomyosin system has calcium ions attached to it. True False  3. Acetyl Choline (ACh) molecules are located in the receptors on the motor end plate. True False  4. The myosin cross bridges come in contact with the actin molecules. True False  5. Calcium is in high concentration in the SR - and low concentration inside the muscle cell. True False

6. The troponin and tropomyosin system is bound to the motor end plate. True False  7. Acetyl Choline ester-ase (AChE) is secreted by the motor neuron. True False  8. Protein molecules inside a sarcomere , such as actin and myosin, are longer when a muscle cell is relaxed, as compared to when it is contracted. True False  9. The motor neuron does NOT secrete any NTS in order to activate relaxation. True False  10. There are NTSs in the receptors on the motor end plate. True False

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