Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Unicorn with ak47
Muscles
| Term | Definition |
|---|---|
| 1Contracttility | shorten with force |
| 2Excitability | respond to stimulus |
| 3Extensibilty | `stretch |
| 4elasticity | ability to recoil |
| 5epimysium | connective tissue sheath around a muscle |
| 6Fascia | connective sheath outside the epimysium |
| 7perimysium | surrounds fasciculi |
| 8Fibers | muscle cell |
| 9endomysium | surronds muscle fibers |
| 10myofibrils | threadlike structure that extends from one end of a fiber to another |
| 11actin myofilaments | thin myofilament, resemble two twisted stands of pearls |
| 12myosin myofilaments | thick myofilament, bundles of golf clubs |
| 13sacromere | when actin and myosin filaments form highly ordered units |
| 14resting membrane potential | the charge difference across a membrane |
| 15action potential | the brief reversal back of a charge |
| 16motor neurons | nerve cells that carry action potentials to skeletal muscle fibers |
| 17neuromusclular junction | branch made up of axons that connects to the muscle |
| 18synapse | near the center of the cell |
| 19motor unit | single motor neuron and all skeletal muscle fibers it innervates |
| 20presynaptic terminal | enlarged nerve terminal |
| 21synaptic cleft | space between presynaptic terminal and the muscle |
| 22postsynaptic terminal | muscle fiber |
| 23synaptic vesicles | in the presynaptic terminal and secretes a neurotransmitter |
| 24acetylcholine | neurotransmitter secreted by synaptic vesicles |
| 25acetylcholinesterase | breaks down acetylcholine |
| 26sliding filament mechanism | sliding of actin myofilaments past myosin filaments during contraction |
| 27muscle twitch | a contraction of the entire muscle in response to a stimulus, causes action potential in one or muscle fibers |
| 28treshold | muscle fiber that wont respond until it has reached this |
| 29all-or-none response | once it has reached the threshold this will happen |
| 30lag phase | time between the application of the stimulus and the beginning of contraction |
| 31contraction phase | time of contraction |
| 32relaxation phase | time when the muscle relaxes |
| 33tetany | when muscles remain contracted without relaxation |
| 34recruitments | the increase number of motor units being activated |
| 35ATP(adenosine triphosphate) | needed for muscle contraction produced in the mitochondria shortlived and unstable |
| 36ADP (adenosine diphosphate) | more stable degenerated ATP |
| 37Creatine Phosphate | stockpiled when ATP can't be stockpiled |
| 38Anaerobic resperation | without oxygen |
| 39Aerobic resperation | with oxygen |
| 40oxygen debt | amount of oxygen needed to convert lactic acid into glucose and replenish depleted stores of creatine phosphate |
| 41muscle fatigue | happens when ATP is used during muscle contraction faster than it can be produced |
| 42isometric | equal distance |
| 43isotonic | equal tension |
| 44muscle tone | constant tension, head up or back straight |
| 45fast twitch fibers | contract quickly and tire quickly |
| 46slow twitch fibers | contract slowly and tire slowly |
| 47origin | most stationary part of a muscle (head) |
| 48insertion | end of muscle outgoing most movement |
| 49belly | portion bewteen head and insertion |
| 50origin insertion and belly | some muscles have multiple of these |
| 51synergist | muscles that work together |
| 52antagonist | muscles that work in opposition other muscles |
| 53prime mover | muscle that plays the most important movement |
| 54Muscles are sometimes named by | location, size, orientation of fibers, shape, origin, insertion and function |
| 55Occipital frontalis | raises eyebrows |
| 56orbicularis oculi | closes eyelids |
| 57orbicularis oris | puckers lips |
| 58buccinator | flattens cheeks |
| 59zygomaticus | smile |
| 60levator labii superioris | sneezing |
| 60depressor anguli oris | frowning |
| 61sternocleidomastoid | lateral neck muscle |
| 62platysma | corner of lips down |
| 63mastication | chewing |
| 64extrensic muscle tongue | moves the tongue |
| 65intrinsic muscles tongue | changes shape of tongue |
| 66erector spinae | along side the vertebral column |
| 67throatic extrensic intercostals | inspiration of fair |
| 68throatic intrinsic intercostals | forced expiration of air |
| 69diaphragm | dome shaped muscle |
| 70muscle contraction causes what to shorten | sacromeres |
| 71H and I Band | shorten during contraction |
| 72A band | doesn't change size |
| 73Tendon | muscle connected to bone |
| 74linea alba | white line of connective tissue that extends from sternum to pubis |
| 75external obligues | help to compress abdominal contents |
| 76gluteus maximus | extends hip |
Created by:
jhammerii
Popular Anatomy sets