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23 Cards in this Set
- Front
- Back
Contractility: |
Ability of a muscle to shorten with force |
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Excitability: |
Capacity of muscle to respond to a stimulus (from our nerves) |
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Extensibility: |
Muscle can be stretched to its normal resting length and beyond to a limited degree |
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Elasticity: |
Ability of muscle to recoil to original resting length after stretched |
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Connective Tissue Coverings of Muscle: (Outside in) |
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Two Myofilaments involved in the Sliding Filament Model of muscle contraction? |
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Whole Molecule of Actin called? |
F actin |
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F actin is made up of small sub units called? |
G actin |
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G actin active sites? |
Where myosin will latch on and articulate with actin |
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Two regulatory proteins involved in Sliding Filament Model of muscle movement? |
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Resting Membrane Potential: |
Slight negative charge inside muscle cells with respect to the outside of cell |
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Two Types of Ion Channels in Muscle Cells: |
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Ligand-gated Ion Channel |
Channels that respond to molecules that bind to receptors |
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Voltage-gated Ion Channel |
Open and close in response to small voltage changes across plasma membrane |
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Neuromuscular Junction |
Synapse between a motor neuron and a skeletal muscle |
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Three major parts of the Neuromuscular Junction: |
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Sarcomere |
A unit of contractile in a striated muscle cell defined from one Z disk to the next adjacent Z disk |
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Z disk |
Anchoring point of actin filaments at either end of the sarcomere |
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M line |
Dark band in middle of Sarcomere |
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A Band |
Dark band of sarcomere that contains Myosin filaments |
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I Band |
Light band of sarcomere that contains Actin Filaments |
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Troponin |
Regulatory protein that interacts with tropomyosin to control the binding of myosin to actin |
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Transverse Tubules |
Deep invagination of the sarcolemma which allow depolarization of the membrane to quickly penetrate to the interior of the cell |