Muscles
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| _______ soft flexible conn tissue needed for flexibility and firmness | cartilage | ||||
| ___ is dense and composed of haversian system ( osteons) | Compact bone | ||||
| ____ contain spiracles of yellow and red marrow | Spongy bone | ||||
| ___ builds bone | osteoBlast | ||||
| ______ destroys bone, bone resorption | osteoclast | ||||
| _______ ______ cartilage replace by bone | endochondral ossification | ||||
| _____ immovable joints | sutures | ||||
| ___ join bone to bone | ligament | ||||
| ___ join muscle to bone | tendon | ||||
| muscle cell aka | fiber | ||||
| ______ membrane around individual muscle cell | endomysium | ||||
| membrane around the bundle of muscle cell | perimysium | ||||
| membrane around the muscle organ/ belly gaster | epimysium | ||||
| _______ bundles of filaments in the muscle fiber | myofibril | ||||
| Myofibrils contain contractile units | sarcomeres | ||||
| sarcomeres have _____ thin filaments and ___ are the thick filament | actin, myosin | ||||
| A band | dArk band, where thick and thin overlap is darkest | ||||
| I band | lIght band, only thin filament | ||||
| H zone | has only thick filaments, is the middle of A band | ||||
| during contraction only _____ are reduced | H zone and I bands | ||||
| neuromuscular junction | b/t nerve terminal and sarcolemma/ muscle fiber | ||||
| ________ released at neuromusc junction | Ach, acetylcholine | ||||
| hows contraction initiated in a muscle | - nerve signal open Ca channels in synaptic bulb - ACh release in synaptic cleft -Ach binds to receptors on sarcolemma -surge of Na in and K out - voltage gate open cuzing action potential - sarcoplasmic reti release Ca -Ca causes contaction of sar | ||||
| all or none respose | stimuls must be at threshold value to elicit a contraction | ||||
| simple twitch | response of a single muscle fiber to a stimulus above threshold | ||||
| tetanus | stong and prolonged contraction in response to frequent stimuli | ||||
| smooth muscles perform | involuntary actions | ||||
| smooth muscles controlled by | Autonomic nervous system | ||||
| smooth muscle characteristics | 1 nucleus no striations | ||||
| cardiac muscle are | striated 1 or 2 nuclei | ||||
| _____ maintains oxygen supply in muscles, has high affinity to Oxygen | myoglobin |
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Created by:
smuttz
on 2011-10-18