Question: 1. Muscular System: Neuromuscular Junction Synaptic Vesicles In The Axon Terminal Of A Motor Neuron Contain What Neurotransmitter? 2. Match These Terms To Their Description: A. Triad B.Sarcolemma C. Sarcoplasmic Reticulum D. T-tubules E. Muscle Fiber F. Myofibril G. Terminal Cisternae H. Mitochondria A. Sac-like Regions Of The Sarcoplasmic Reticulum …

1. Muscular System: Neuromuscular Junction Synaptic vesicles in the axon terminal of a motor neuron contain what neurotransmitter? 2. Match these terms to their description: A. Triad B.Sarcolemma C. sarcoplasmic reticulum D. T-tubules E. muscle fiber F. myofibril G. Terminal cisternae H. mitochondria a. Sac-like regions of the sarcoplasmic reticulum that contain calcium ions. b. Sites of ATP synthesis. c. Plasma membrane of the muscle cell. d. Alternative name for skeletal muscle cells. c. Interconnecting tubules of endoplasmic reticulum that surround cach myofibril. f. A group of one T tubule lying between two adjacent terminal g. Invaginations of the sarcolemma that is projecting deep into the cell. h. Contains the contractile filaments within the skeletal muscle cell. cisternae. 3 4. 6. 7. An action potential in the axon terminal of a motor neuron opens what type of ion channels? By what means of membrane transport does the neurotransmitter leave the axon terminal? 5. Binding of neurotransmitter to the receptors on the motor end plate opens what type of ion channels? How is the neurotransmitter removed from the synaptic cleft? Opening of these channels leads to of the motor end plate. As a result of question 7, an action potential is propagated along the of the muscle cell and down the into the cell. 9. The result of this action potential releases what ion from the terminal cisternae? 10. What ion diffuses into the axon terminal to stimulate the release of acetylcholine? 8 11. In order to contract, a muscle fiber must be stimulated by what type of cell from the nervous system? 12. What happens to chemically-gated channels when acetylcholine binds to them?