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muscles
| Question | Answer |
|---|---|
| raises the eyebrows | occipitofrontalis |
| closes the eyelids | orbicularis oculi |
| puckers the lips | orbicularis oris |
| flattens the cheeks | buccinator |
| what are the kissing muscles | orbicularis oris and buccinator |
| smiling muscle | zygomaticus |
| sneering | levator labii superioris |
| frowning | depressor anguli oris |
| what are the 4 pairs of mastication muscles | 2 pair of pterygoids, temporalis, and masseter |
| changes the shape of the tongue | intrinsic tongue muscles |
| move the tongue | extrinsic tongue muscles |
| neck muscle | sternocleidomastoid |
| sheetlike muscle that covers the anterolateral neck | platysma |
| group of muscles on each side of the back | erector spinae |
| elevate the ribs during inspiration | external intercostals |
| contract during forced expiration | internal intercostals |
| accomplishes quiet breathing | diaphragm |
| one muscle that plays the major role in accomplishing a desired movement | prime mover |
| muscles that work in opposition | antagonists |
| muscles that work togeather to accomplish specific movements | synergists |
| without oxygen | anaerobic respiration |
| with oxygen | aerobic respiration |
| the amount of oxygen needed in chemical reactions to convert lactic acid to glucose | oxygen debt |
| results when ATP is used during muscle contraction | muscle fatigue |
| the length of the muscle does not change {equal distance | isometric |
| the amount of tension produced by the muscle is consistant during contraction {equal tension | isotonic |
| tension produced by muscles of the body | muscle tone |
| contract quickly fatigue quickly | fast-twitch fibers |
| contract more slowly and fatigue slowly | slow-twitch fibers |
| most stationary end of the muscle | origin |
| end of the muscle undergoing the most movement | insertion |
| portion of muscle between the insertion and origin | belly |
| ATP stored in a high energy molecule | creatine phosphate |
| the sliding of actin myofilaments past myosin myofilaments | sliding filament mechanism |
| a contraction of an entire muscle | muscle twitch |
| muscle will not respond to stimulus until the stimulus reaches the level called | threshold |
| the point at which the muscle fiber will cantract maximally | all-or-none response |
| the time between application of a stimulus to a motor neuron | lag phase |
| time of contraction | contraction phase |
| time at which the muscle relaxes | relaxation phase |
| where the muscle remains cantracted without relaxing | tetany |
| the increase in number of motor units being activated is | recruitment |
| to shorten with force | contractability |
| to respond to a stimulus | excitability |
| ability to be strached | extensibility |
| ability to recoil back to original length after being streached | elasticity |
| connective tissue sheath that surrounds the skeletal muscle | epimysium |
| lacated outside the epimysium | fascia |
| aa threadlike structure that extends from one end of the fiber to the other | myofibrils |
| thin myofilaments | actin myofilaments |
| thick myofilaments | myosin myofilaments |
| highly ordered units of actin and myosin myofilaments | sarcomeres |
| adducts and flexis humerus | pectoralis major |
| flexis vertebral column | rectus bdominus |
| flexis and rotates vertebral column | external oblique |
| flexes elbow and supinates forearm | biceps brachii |
| abducts arm | deltoid |
| flexis thigh on hip | sartorius |
| extends to toes and dorsiflexes foot | extensor digitorum |
| extends neck and adducts scapula | trapezius |
Created by:
cookimnstrchris
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