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+ Muscular System
* Muscular System
| Question | Answer |
|---|---|
| 2 major functions of the muscular system | movement heat production |
| How does the muscular system provide movement | muscles span over a joint(s) allowing the bones to move and propel. lift. chew, talk. etc |
| How does the muscular system provide heat production | rapid muscle contration provides heat for the body |
| Skeletal muscle contraction uses | ACH ATP Sodium Calcium |
| origin | muscle origination less moveable part |
| insertion | muscle grows into this point most moveable part |
| muscle action | what happens when the more mobile bone is brought toward the more stable bone during a muscular contraction |
| agonist | a muscle whose contraction moves a part of the body directy |
| antagonist | lengthening muscle while contracting to facilitate the arrect of the bone movement |
| prime mover | the muscle which provides the primary force of movement |
| synergist | muscles that work with the prime mover to create movement |
| fixators | a muscle which acts as the stabilizer and helps the agonist work effectively |
| stabilizer | smaller muscle that support the body/joint while the primary mover performs the intended movement |
| shunt muscle | originates closer to the joint it crosses than the joint iit inserts. Helps to stabilize the joint |
| spurt muscle | originates farther from the joint than it inserts |
| neurtralizers | muscles that contract to prevent unwanted actions that occur as a result of the contraction of other muscles |
| contracture | muscle contraction activity without electrical activity |
| convulsion | abnormal, uncoordinated tetanic contractions of varying groups of muscles |
| cramps | painful muscle spasms |
| fasciculation | visible, involuntary twitch of the muscles of a motor unti of short duration |
| fibrillation | abnormal contraction in which muscle contract asychronously |
| hypertonia | increase in muscle tone |
| hypotonia | decrease in muscle tone |
| myalgia | pain originating in the muscle |
| myoma | tumor in the muscle |
| myositis | inflammation of muscle |
| rigidity | muscle spasm of both agonist and antagonist |
| spasm | persistent contraction of muscle that cannot be released voluntarily |
| spasticity | muscle spasm observed in conditions and brain or spinal cord injury. Increased excitability of the stretch reflex |
| tic | involuntary spasmodic twitch of muscle (usually in the face) |
| tremor | repetitive, involuntary, oscillatory movement caused by irregular contraction of opposing muscle groups |
| intrinsic muscles | smaller muscles located within the various body areas (hand, foot, trunk) |
| extrinsic muscles | muscles that originate outside the area and crosses a joint (forearm to hand, lower leg to foot, etc) |
Created by:
Zenfenn
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