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muscles
| Question | Answer |
|---|---|
| occipitofrontalis | raises the eyebrows |
| orbicularis oculi | closes eyelids |
| orbicularis oris | puckers lips |
| buccinator | flattens cheeks |
| orcbicularis oris - buccinator | kissing muscle |
| zygomaticus | smiling |
| levator labii superioris | sneering |
| depressor anguli oris | frowning |
| mastication | chewing |
| 4 pairs of mastication muscles | 2 temporalis 2 masseter |
| intrinsic tongue muscles | change the shape |
| extrinsic tongue muscles | moves the tongue |
| sternocleidomastoid | lateral neck muscles/ prime mover |
| platysma | sheetlike muscle, covers the anterolateral neck |
| erector spinae | group of muscles on each side of the back |
| external intercostals | elevate the ribs during inspiration |
| internal intercostals | contract during forced expiration |
| diaphragm | accomplishes quiet breathing |
| abdominal wall muscles | muscles of abdominal wall flex and rotate vertebral column, hold in abdominal viscera |
| linea alba | tendinous area of the abdominal wall, white connective tissue rather than muscles |
| rectus abdominious | on each side of linea alba |
| trapezius | rotates scapula |
| serratus anterior | pulls scapula anteriorly |
| pectoralis major | adducts and flexes the arm |
| latissimus dorsi | medially rotates, adducts, extends the arm |
| deltoid | attaches the humerus to the scapula and clavicle |
| triceps brachii | extends forearm |
| biceps brachii | flexes forearm, occupies anterior compartment of the arm |
| brachialis | flexes forearm |
| retinaculum (bracelet) | strong fibrous connective tissue that covers the flexor and extensor tendons and holds them in place around wrist. |
| flexor carpi | flexes the wrist |
| extensor carpi | extends the wrist |
| flexor digitorum | flexes the finger |
| extensor digitorum | extends the fingers |
| intrinsic hand muscles | 19 hand muscles |
| interossi muscles | located between metacarpals, are responsible for abduction and adduction of the figers |
| gluteus maximus | buttocks |
| quadriceps femoris | extends the leg. anterior thigh muscles |
| sartorius | "tailors muscle", flexes the thigh |
| hamstring | postier thigh muscles, flexes leg extends thigh |
| gastrocnemiua and solus | for the calf muscle |
| calcaneal tendon (achilles tendon) | flexes foot and toes |
| peroneus | lateral muscle of leg |
| intrinsic foot | 20 muscles located in foot, muscles flex extend, abduct, and adduct toes |
| contraction | process of becoming smaller |
| muscle fibers | cell composed of myofibers that contract when stimulated |
| skeletal muscle | connected to the skeleton to form part of mechanical system |
| endomysium | enshealths each individual myocyte |
| perimysium | shealth of connective surrounding a bundle of muscle fibers |
| fasicle | bundle of structures |
| smooth muscle | contractile fibris are not highly ordered |
| cardiac muscle | another term for myocardium |
| sarcolemma | fine transparent tubular sheath |
| sarcomere | structure unit of a myofiber in striated muscle |
| myosin | fibrous protein that forms the contractile filaments of muscle |
| actin | protein that forms together |
| sarcoplasmic reticulum | specialized endoplasmic of cardiac muscle |
| motor unit | made up of a motor neuron and the skeletal muscle |
| axon | long threadlike part of a nerve cell |
| acetyliecholine | compound that occurs throughout the nervous system |
| muscle fatigue | muscle to generate force |
| isotonic | length of muscle |
| isometric | strength training in which joint angle and muscle length do not change |
| orgin | where something begins |
| insertion | action of inserting something |
| synergists | a substance organ |
| antagonists | substanaces that inhibits physiological action |
| fixators | muscle that acts of a stabilizer |
| contractility | shorten with force |
| excitablilty | capacity to respond to a stimulus |
| extensibility | ability to stretch |
| elasticity | ablilty to recoil to original length after stretch |
| muscle fiber | single cylinder cell containing several nuceli |
| fasciculi | composed of single muscle called fibers |
| muscle twitch | contraction of entire muscle in response to stimulus that causes the action potential in one or more muscle fibers |
Created by:
sadieplymale1221
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