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10 Cards in this Set
- Front
- Back
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Smooth muscle
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- involuntary
- nonstriated - ANS |
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Cardiac Muscle
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- involuntary
- striated - autorhythmic - ANS |
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Skeletal Muscle
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- voluntary
- striated - somatic NS |
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Four properties of muscles
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- excitability: ability to receive and respond to a stimulus
-contractility: ability to shorten when adequately stimulated - extensibility: ability to stretch beyond resting length - elasticity: ability to resume resting length after stretch. |
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What is the series of elastic elements from (least to most complex)
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- Muscle Cells: endomysium
- fascicle: perimysium - Muscle: epimysium |
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What are muscle cells innervated by and what are they made of.
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- innervated by one motor neuron terminal
- made of myofibrils (80% of the volume) |
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What are the thick and thin filaments of a myofibril made of
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- Thick filament: myosin
- Thin filament: actin, tropomyosin, troponin |
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Components of:
- I band - A band - H zone - Z disc - M line |
- I band: just thin actin
- A band: thick and thin - H zone: only thick bands. - Z disc; where think filament meet - M Line: central area of thick line. |
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How can contraction be explained by looking at the muscle.
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A person needs to focus on the Z line which is the area it is possible to notice the lines thin filaments sliding towards one another.
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What do the Head and tail of myosin look like?
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- Heads: ATP binding site and Actin binding site
- tails: core of thick filaments. |
