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Related Flashcards
Cards In This Set
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Movement is _______________ to all living things
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Fundamental
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Muscle cells convert one kind of energy into another kind of energy. What are they?
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ATP --> Mechanical Energy
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Types of muscle
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Skeletal, cardiac and smooth
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Physiology of skeletal muscle
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(function of skeletal muscle:) ---> the basis of warm-up, quickness, strength, endurance and fatigue. These are the things that we look at when we study skeletal muscle.
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List the 5 characteristics of muscle
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Responsiveness, conductivity, contractility, extensibility, elasticity.
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Talk a little about the 5 characteristics of muscle
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Responsiveness is also called "excitability" (chemical signals, stretch and electrical changes across the plasma membrane)
conductivity ( the local electrical change which triggers a wave of excitation that travels along the muscle fiber) contractility (muscle shortens when stimulated) extensibility (capable of being stretched between contractions) elasticity (returns to its original resting length after being stretched) *VERY IMPORTANT to know the difference between the last 2. Elasticity is not stretchiness. |
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The Four Main Functions of Muscle
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Movement, Stability, Control of Openings and Passageways, Heat Production by skeletal muscles
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What percentage of body heat do our muscles regulate?
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85%
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Skeletal muscle
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Voluntary, striated muscle attached to one or more bones
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Striations
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Alternating light and dark transverse bands (results from an overlapping of internal contractile proteins)
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Voluntary
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Usually subject to conscious control
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Muscle cell is also known as ____ or _____ and is ____ cm long
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Muscle fiber, myofiber, 30
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Muscles are like matruska dolls with organelles packaged inside of organelles packaged inside of organelles. Start at the largest and work your way to the smallest units which can be found in a muscle.
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A muscle (such as gastrocnemius) bound by epimysium covered with shiny fascia.
Fasicles bundled together by perimysium within each Fascicle are myofibers or muscle cells bundled together by endomysium within each myofiber are bundles of myofibrils within each myofibril are myofilaments |
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Contraction happens at the __________ level
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Myofibril
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Endomysium
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Surrounds muscle fasicles
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