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JB anatom Phys
Muscular System
| Question | Answer |
|---|---|
| Muscular System functions | movement, maintanance of posture, and production of heat |
| A characteristic of muscle tissue is ____________. This means that it will espond to a stimulus that requires action of the nerves | irritability |
| a characteristic of muscle tissue is _____________________________ and ____________________. This means it can stretch and resume former length | extensibility, elasticity |
| muscle tissue is _________. This means it can shorten and thicken to exert pull. | contractable |
| muscle tissue-tone: | slight tension |
| Muscle tissue fatique | the ability to respond to a stimulus |
| naming muscles | 1. shapes (deltoid (triangular)serratus (sawtooth) and trapizius (trapezoid) 2. sizes 3. points of attachement 4. location 5. action 6. direction of muscle fibers |
| muscles are used for facial expression: | frontalis (raise eyesbrows. orbicularis (close eyes), orbicular oris (pucker mouth, buccinator (whistle, blow), and zygomaticus (smile) |
| Muscles that move the head are: | sternocleidomastoid: flex the head trapezius: hold up and extend the head |
| deltoid | abduct the arm; used for IM injections |
| pectoralis major and minor | extend and abduct the arm |
| serratus anterior | pulls the scapula down and forward |
| latissimus dorsi | extends and helps adduct the arm |
| biceps brachii | flexes teh lower arm and supinates the hand |
| triceps brachii | extends teh lower arm (forearm) |
| muscles of respiration | diaphragm and intercostals |
| muscles of the abdominal wall | rectus abdominus, transverse abdominus, internal oblique, external oblique |
| iliosoas | flexes the thigh |
| gluteus maximus | extends the leg |
| gluteus medius | abducts the thigh; IM injections |
| adductor longus, gracilus, and adductor magnus | adducts the thigh |
| qyuadriceps (rectus femoris, vastus lateralis, vastus medialis | extend the leg |
| hamstring group (biceps femoris, semitendinosus, and semimembranous | flex the leg |
| sartorius | longest muscle in teh body; used to cross legs |
| gastrocnemius | calf muscle used for planter flexion (stand on tiptoe) |
| tibialis anterior | dorsiflexes the foot |
| peroneous | used for eversion of the foot |
| smooth muscles | located in the visceral organs under the control of the autonomic nervous system |
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schxoxo
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