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34 Cards in this Set
- Front
- Back
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Heat generation? |
Muscles contractions produce heat |
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Contractility? |
Generate pulling force |
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Excitability? |
Stimulates the muscle cell to contract |
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Extensibility? |
Contraction of an opposing muscle |
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Elasticity? |
Can recoil after being stretched |
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What are the 3 types of muscle? |
Skeletal Cardiac Smooth |
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Skeletal muscle tissue? |
Makes of 40% of weight Cells are striated |
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Cardiac muscle tissue? |
Walls of the heart |
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Smooth muscle tissue? |
Walls of hallow organs Cells lack striations |
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Actin? |
Proteins that make up thin filaments |
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Mysoin? |
Thick filaments |
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plasma membrane = ? |
Sarcolemma |
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Cytoplasm = ? |
Sarcoplasm |
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Endoplasmic reticulum = ? |
Sarcoplasmic reticulum |
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Epimysium? |
Dense irregular connective tissue surrounding entire muscle |
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Perimysium? |
Surrounds each fascicle |
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Endomysium? |
Sheath of C.T wrapping each muscle cell |
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How many nerves is a skeletal muscles supplied by? |
One nerve |
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Origin? |
Less movable attachment |
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Insertion? |
More moveable attachment |
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Fleshy attachments? |
C.T fibers are short |
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Indirect attachments? |
C.T forms a tendon |
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Myofibrils? |
Long rods within cytoplasm |
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Sacromeres? |
Long row of repeating segments |
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Z disc/line? |
Boundaries |
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Thin actin filaments? |
Extend from Z disc toward the center of the sacromere |
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Sliding filament theory? |
Myosin heads attach to actin in thin filaments , then pivot to pull thin filaments inward towards the center of the sacromere |
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Intercalated disc? |
Complex junction Each cells contains one or two centrally-located nuclei |
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Intercalated discs? |
Complex junctions |
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Longitudinal later? |
Muscle fibers rub parallel to organs long axis |
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Circular layer? |
Muscle fibers run around circumference of the organ |
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What do both longitudinal and circular layer participate in? |
Peristalsis |
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Do smooth muscle cells contain sacromeres? |
No |
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Caveolae? |
Tiny infoldings of the sarcolemma that help spread electrical signal |
