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muscles
| Question | Answer |
|---|---|
| 2 muscles the are striated | cardiac and skeletal |
| intercalated disk | membrains that appear as dark lines between cells |
| intercalated disk are found in the | cardiac muscle |
| 3 primary functions of skeletal muscles | movement of the skeleton,maintence of posture,generation of heat |
| fascicle | individual muscle fibers arranged in bundles |
| endomysium | deepest layer that surrounds the individual fibers in the fascicles |
| motor unit | single neuron and all muscle fibers it stimulates |
| neurotransmitter is released at the neuro muscular junction | acetylcholine(ACH) |
| excitability | able to transmit electrical currents along with plasma membrane |
| myoglobin | stores additional oxygen |
| when does muscle relaxtion occur | when stimulation ends and the calcium is pumped back into the ER |
| ATP | used to detach myosin heads and move them back in position for another power stroke |
| contractility | the compacity of muscle fiber to undergo shortening and to change its shape becoming thicker |
| what gives the skeletal muscle its straited appearance | actin(thin) myosin(thick) |
| when muscles r at rest what 2 proteins block the sites on actin filaments where cross bridges can form | troponin and tropomyosin |
| what has to attach to proteins so that binding sites are uncovered | calcium |
| muscle tone | partially contracted state of muscle that is normal even when muscle is not in use |
| hypertrophy | muscle cells increase in size |
| lactic acid | accumulates in cells during anaerobic metabolism |
| anaerobic | not requiring oxygen |
| prime mover | muscle that performs movement |
| insertion | attachment to part of the body that muscle puts into action |
| orgin | less movable(more fixed) attachment |
| isometric | no change in muscle length but there is a great increase in muscle tension(ex.pushing against a immovable force) |
| isotonic | tone or tension w/in a muscle remains the same but muscle as whole shortens producing movement(ex.lifting weights) |
| trapezius | posterior of neck and upper back to clavicle and scapula,raises shoulder and pulls it back,extends head |
| diaphragm | dome shaped partition between thoracic and abdominal cavities,dome decends to enlarge thoricac from to to bottom |
| glycogen | stores additional glucose |
| creatine | stores energy |
| class of lever being used when the bicep flexes the forearm at the elbow | third class |
| muscle of the lips | orbicularis oris |
| muscle that refers to the fleshy part of the cheek | buccinator or trumpeters muscle |
| temporalis | surerior to ear(largest muscle to mastication) |
| messeter | anlge of the jaw(largest muscle to mastication) |
| wryneck | common name for torticollis |
| where is the iliopsoas located | crosses fron of hip joint to femur |
| muscle that covers the anterior and lateral femur | quadriceps femoris |
| what do hamstrings do | flexes leg |
| what muscle is being used standing on tip toes | gastrochemius |
| antagonist to the gastrocemius | tibilis anterior |
| student elbow | olecranon bursitis |
| house maids knee | prepatellar bursitis |
| contractility | capacity of muscle fiber to undergo shortening and chage shape becoming thicker |
| lever | bone |
| fullcrum | joint |
| antagonist | muscle that produces an opposite movement to that of the prime mover |
| synergist | w/w prime movers to acomplish a movement |
| obicularis | circular |
| rectus | straight |
| ceps | # of heads(attachment points) |
| flexor | bending |
| levator | lifter |
| sternocleidomastoid | head foward on chest |
| tranversus abdominis | innermost abdominal muscle |
| what does the gluteus medius do | abducts thigh |
| spasm | sudden involuntary muscle contraction |
| colic | spasm of visceral muscles |
| atrophy | waising or decrease in size of a muscle it cannot be used |
| myalgia | muscular pain |
| fibrositis | inflamation of connective tissue,refers to tissue associated muscle and joint |
| carpal tunnel effects the tendons and | flexor muscles of fingers and nerves in hands and fingers |
| when muscles are at rest what two proteins block the sites on actin filaments where cross bridges can form | troponin and tropomyosin |
Created by:
cornejo
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