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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 |