chapter 6 anatomy
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| Skeletal muscle | Attached to bones
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| Cardiac muscle | Walls of the heart
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| Smooth muscle | Mostly in the hollow visceral organs
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| Deep to the dermis | Hypodermis
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| Epidermis | Outer layer
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| Nerve fiber | Axon
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| Irritability | Ability to receive and responds to stimulus
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| Anerobic | Without oxygen
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| Aerobic | With oxygen
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| Aerobic or endurance | Jogging biking . Result in strong result of more flexible muscles . More resistance to fatigue
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| Contractility | The ability of skeletal muscle shortens force
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| Excitability | The capacity of skeletal muscle to respond to a stimulus
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| Extensibility | The ability to be stretched
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| Elasticity | Ability to recoil to the original resting length after they have been stretched
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| Epimysium | Connective tissue Sheath that surrounds the skeletal muscle
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| Fascia | Connective tissue located outside the Epimysium
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| Perimysium | Loose connective tissue that surrounds
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| Muscle cells | Muscle fibers
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| Myofibrils | Threadlike structure that extends from one end of the Farber to another
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| Actin myofilaments | Thin
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| Myosin myofilaments | Thick
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| Actin and myosin myofilaments form highly ordered units | Sarcomeres
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| Motor nuerons | Nerve cells that carry action potential to skeletal muscle fibers
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| Nueromuscular junction | Synapse
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| Neurotransmitter | Acetylcholine
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| Muscle fiber | Postsynaptic terminal
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| Muscle cell | Synaptic cleft
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| The brief reversal back of the charge is called | Action potential
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| The charge difference across the membrane is called | Resting membrane potential
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| Muscle twitch | The contraction of an entire muscle in response to a stimulus that causes the action potential in one or more muscle fibers
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| Phenomenon | All or none response
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| A muscle fiber will not respond to stimulus until that stimulus reaches a level called | threshhold
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| Lag phase | The beginning of a contraction
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| Contraction phase | The time of the contraction
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| Relaxation phase | The time that the muscle relaxes
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| Tetany | Where the muscle reminds contracted without relaxing
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| The increase in number of motor units being activated is called | recriutment
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| ATP | Is needed for energy for muscle contraction
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| ATP | Is produced in the mitochondria
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| ATP | Is short-lived and unstable
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| Aerobic | With O
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| Anaerobic | Without O
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| Muscle fatigue | Get tired
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| Isometric | Tension changes length same
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| Isotonic | Tension same length changes
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| Muscle tone | Constant tension
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| Fast twitch | Light meant
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| Slow twitch | Dark meat
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| Oxygen debt | Trying to get o back
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| Orgin | Head
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| Insertion | End
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| Belly | Between insertion and head
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| Muscles that work together | Synergist
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| Muscles that work against each other | Antagonists
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| Plays a major role | Prime moverv
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| Gluteus Maximus | Buttocks
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| Flexor carpi | Flexes the wrist
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| Extensor carpi | Extends the wrist
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| Extensor digitorum | Extends the fingers
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| Flexor digitorum | Flexes the fingers
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| Retinaculum | Bracelet
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| Tricep | Extends 4 arm
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| Biceps | Flex the forarn
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| Brachialis | Flexes 4 arm
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| Trapezius | Rotates scapula
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| Sereatus | Pulls scapula
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| Mastication | Chewing
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| Sternocliedomastoid | Neck
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| Intrinsic | Change shape
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| Extrinsic | Move tongue
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| Zygomaticus | Smiling
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| Buccinator | Flattens checks
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| Occipitofrontalis | Raises the eyebrows
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| Orbicularis oculi | Closes eyelids
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| Orbicularis oris | Puckers the lips
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Created by:
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