Topic 9. Myology assignments.pdf

Plasma membrane of the skeletal muscle cell a long

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Plasma membrane of the skeletal muscle cell A long organelle found within the skeletal muscle cell that has banded appearance Actin or myosin containing structure A structure storing calcium ions in a muscle fiber A unit composed of two terminal cisternae and one T-tubule An invagination of sarcolemma carrying electrical signals inside the cell Regulatory proteins of skeletal muscle Region with thick and thin filaments Connective tissue surrounding each myofiber Assignment 3. DIRECTED ACTIVITY. Neuro-muscular junction. Complete after viewing the video on Neuro-Muscular Junction. Draw the synapse between a motor neuron and a skeletal muscle cell. Label: the neuromuscular junction (NMJ), vesicles of Ach, synaptic knob, voltage-gated Ca channels, synaptic cleft, motor end plate, junctional fold, Ach receptors, ligand gated Na channels.
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KINS 2531. Dr. Sturges. Myology assignments. Assignment 4-review. Excitation. Fill in the blanks. The axon of each motor neuron has numerous endings called ________________. They hold many small vesicles containing a neurotransmitter called _________found in the neuromuscular junction. The actual gap between the synaptic knob and the skeletal muscle cell is called a _____________________ When the ____________ reaches the synaptic knob, it opens __________Ca channels. This increases the permeability of the synaptic knob to ______ ions and these ions diffuse _______ the ______cell. The presence of ions in the synaptic knob allows the release of _____ through _____________ into the synaptic cleft. Ach diffuses through the synaptic cleft to bind to the ______________ on the junctional folds of the ________cell. Binding of the neurotransmitter causes the sarcolemma to become more permeable to _____ions, rushing them into the sarcoplasm and _____________it. This is a localized event (confined to junctional folds) and as such it is a _________ potential known as EPSP.
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  • Spring '11
  • Sturges

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