muscle chapter
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| The ability to be stretched | Extensibility
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| occipitofrontalis | raises eyebrows
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| The ability of skeletal muscle to be shortened with force. | contractibility
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| The capacity of skeletal muscle to respond to a stimulus. | excitablity
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| ability to recoil to their original resting length after they have been stretched. | elasticity
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| epimysium | each skeletal muscles is surrounded by connective tissue sheath
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| zygomaticus | smiling muscle
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| the most stationary end of the muscle | origin or head
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| nerve cells that carry action potentials to skeletal muscle fibers | motor neurons
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| a single motor neuron and all the skeletal muscle fibers it innervates. | motor unit
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| what is ATP? | adenosine triosphate
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| buttocks | gluteus maximus
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| hip muscle commmonly called the buttox | gluteus medius
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| muscles that work together are? | synergists
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| levator labii superioris | sneering
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| platysma | pulls corners of lips downward
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| thin myofilaments | actin myofilaments
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| thick myofilaments | myosin myofilaments
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| where the muscle remains contracted without relaxing | tetany
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| forehead | frontalis
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| when the limb movs toward the body midline. | adduction
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| movement of the bone around its longitudinal axis | rotation
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| moving the limb away from the midline | abduction
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| what are the three types of muscle tissue | skeletal, cardiac, and smooth
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| what is the end of the muscle undergoing the greatest movement | insertion
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| what is the muscle that plays the major roll in accomplishing the desired movement | prime mover
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| what closes the eyelid | orbicularis oculi
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| what is the buccinator | flattens the cheeks
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| what is the depressor anguli oris | sneering muscle
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| orbicularis oris | puckers the lips
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| what is the stynocleidomastoid | lateral neck muscle
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| what are the two kissing muscles | obicularis oris and buccinator
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| chewing | mastication
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| what are two characteristics of the cardiac muscle | involtentary and not straited
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| what is a muscle fiber | endomysium
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| what is a time of contraction | contraction phase
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| when does aerobic exercise take place | in the prsence of oxygen
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| when does anerobic exercise take place | in the absence of oxygen
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| what are the two types of muscle contractions | isometric and isotonic
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| what are two types of fibers | fast twitch and slow twitch
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| muscle fibers are resistant to fatigue | slow twitch
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| muscles that work opposite of each other | antagonist
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| the point where the muscle fiber will contract maximally | threshhold
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| each fiber is surrounded by a connective tissue sheath called what? | endomysium
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| the increase in the number of motor units being activated | recruitment
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| what is the brief reversal back of the charge | action potential
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| what iss produced in the mitochondria | ATP
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| what is short lived and unstable | ATP
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| what results when ATP is used during muscle contraction faster than it can be produced | muscle fatigue
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| what is the portion of the muscle between the origion and the insertion | belly
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| what is the constant tension produced by muscles of the body for long periods of time | muscle tone
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| what contracts quickly and fatigue quickly | fast-twitch fibers
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| contracts slow | slow- twitch fibers
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| the length of the muscle will not change but the amount of tension increases | isometric
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| the amount of tension produced by the muscle is constant during contraction | isotonic
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| the amount of oxygen needed in chemical reactions to covert lactic acid | oxygen debt
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| without oxygen | anaerobic respiration
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| with oxygen | aerobic respiration
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| when muscles rest and they cant stockpile ATP but they can store another high energy molecule | creatine phosphate
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| what is packaged into the organs | skeletal muscle fibers
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| what is found in only one place in the body which is the heart | cardiac muscle
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| deltoid | abducts humerus
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| calcaneal tendon | achilles tendon
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| triceps | arm muscle
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| trapezius | extends neck and adducts scapula
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| erector spinae | extends back
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| latissimus dorsi | extends and adducts humerus
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| soleus | arises on the tibia
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| gastronemius | forms the curved calf on the posterior leg
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| extensor digitorium | arises from the lateral tibialis
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| sartorius | compared to other thigh muscles described here, the thin, straplike sartorius
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| sternocleidomastoid | muscles are two-headed muscles, one found on each side of the neck
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| when the fascicals arranged in conconcentric | circular
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| fascicles converge toward a single insertion tendon | convergant
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| the length of the fascicles run parallel to the long axis of the muscle | parallel
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| short fasciclas attach obliquely to the central tendon | pennate
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