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Laughing muscle
Risorius muscle
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Frowning muscle
Depressor anguli oris muscle
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Strongest muscle in the human body
Masseter muscle
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Called as pouting muscle
Mentalis muscle
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Narrows and elongates the tongue
Transverse muscle
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Flattens and widens the tongue
Vertical muscle
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Alternative term for hamstring
Posterior compartment of the legs
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RICE
Rest, Ice, Compression, Elevation
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Event wherein the kneecap glides as the knee bends or straightens
Patellofemoral groove
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Compartment of the legs
Anterior, Posterior, Medial
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Set of muscle abducts the thigh
Deep Hip Muscle
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Four sites of IM
Thigh, Arm, Hip, Buttocks
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Attachment of a muscle's tendon to the stationary bone
Origin
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Attachment of muscle's other tendon to the movable bone
Insertion
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Major movement produced in the thorax during quiet breathing is accomplished here
Diaphragm
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Name one rotator cuff muscle
Subscapularis, supraspinatus, infraspinatus, teres minor
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Contraction of a fiber muscle in response to stimulus
Muscle twitch
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Temporary state of reduced work capacity
Fatigue
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Respiration that produces ATP, CO2, Water
Aerobic respiration
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Produces ATP and lactate
Anaerobic Respiration
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Stimulation are so rapid that no relaxation occurs
Tetanus
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Three phases of muscle twitching
Lag Phase, Contraction Phase, Relaxation Phase
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Responsible for keeping the back and legs straight, the head in upright position from bulging
Muscle Tone
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Resulting periodic spontaneous contraction of smooth muscle
Autorhythmicity
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Enlargement of muscle fibers due to exercise
Hypertrophy
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Type of skeletal muscle fiber that is used for the maintenance of posture, walking, endurance activities
Slow-twitch (Type 1)
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It happens when the amount of tension produced by the muscle is constant during contraction, but the length of the muscle decreases
Isotonic Contraction
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TRUE or FALSE
Magnum means largest
FALSE
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TRUE or FALSE
Pectoralis minor is considered as the swimmer's muscle
FALSE - latissimus dorsi
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TRUE or FALSE
SPINOUS ERECTAE is the one who's responsible for keeping the back straight and the body erect
FALSE
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It is a muscle that is attached to the bones
Skeletal muscles
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Skeletal muscle is ____% of body weight and is a ________ muscle
40% ; striated
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It's only one action is to shorten; shortening generates pulling force
Contractility
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Capacity pf muscle to respond to an electrical stimulus
Excitability
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muscle can be stretched beyond its normal resting length
Extensibility
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recoil/spring back to its original resting length
Elasticity
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It is a connective tissue sheath that surround skeletal muscle; muscular fascia
Epimysium
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Visible bundles in skeletal muscles
Muscle fasciculi
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Loose connective tissue that surrounds muscle fasciculi
Perimysium
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Muscle cells inside fasciculi
Muscle fibers
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Cell membrane of the muscle fiber
Sarcolemma
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Tubelike imaginations; connects sarcolemma to the sarcoplasmic reticulum
T tubules
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has high concentration of Ca which play a MAJOR role in muscle CONTRACTION
sarcoplasmic reticulum
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cytoplasm inside each muscle fiber
Sarcoplasm
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threadlike structures that extend from one end of the muscle fiber to the other
Myofibrils
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2 major kind of protein fibers
Actin myofilament ; Myosin myofilament
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it is a highly ordered arrangement, repeating units of actin and myosin myofilament
Sarcomeres
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it joined end to end to form the MYOFIBRILS
sarcomeres
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THIN myofilament
Actin myofilaments
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have attachment sites for myosin myofilament
Actin myofilament
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molecules attached at the specific intervals along actin myofilaments
Troponin
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have binding sites for Ca2+
Troponin
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Located along the groove between twisted strands of actin myofilaments subunits
Tropomyosin
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It covers/blocks myosin myofilaments binding sites on actin myofilaments
Tropomyosin
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THICK myofilaments
Myosin myofilaments
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this can bind to attachment sides on actin myofilament
Myosin heads
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this can bend and straighten during contraction; can also break down energy
myosin heads
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basic structural and functional unit of skeletal muscle
sarcomeres
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it is also the smallest portion of skeletal muscle that is capable for contraction
sarcomeres
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NEGATIVELY charged INSIDE of cell membrane
Polarized
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occurs because there is an uneven distribution of ions across the cell membrane
Resting membrane potential
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K is higher INSIDE the cell membran; Na is higher OUTSIDE the cell
Resting membrane potential
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INSIDE the cell membrane is POSITIVE
depolarization
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Na movement stop; K movement out of the cell increases Na movement stop; K movement out of the cell increases
Repolarization
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NEGATIVEly charged INSIDE again; change back to RMP
Repolarization
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rapid depolarization and repolarization of the cell membrane
Action potential
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In muscle fibers, action potential = ?
muscle contraction
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Specialized nerve cells that stimulates muscle to contract
Motor neurons
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Junction with a muscle fiber
Neuromuscular junction
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cell to cell junction between a nerve cell and another nerve cell
Synapse
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1 motor neuron, + all skeletal muscle fibers =?
Motor units
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Enlarged axon terminal
Presynaptic terminal
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space between presynaptic terminal and the muscle fiber membrane
Synaptic cleft
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Cell membrane or sarcolemma
Postsynaptic terminal
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small vesicles inside presynaptic terminal that contains Acetylcholine
Synaptic vesicles
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It is a neurotransmitter that is released by a presynaptic nerve cell that stimulates postsynaptic cell
Acetylcholine
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It is an enzyme that breaks acetylcholine released between atoms and muscle fibers
Acetylcholinesterase
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sliding of actin myofilaments past myosin myofilaments during contraction
sliding filament method
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In this method, H zone and I bands shorten during contraction
Sliding filament method
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Exposed attachment sites on the actin myofilaments bind to the heads of myosin myofilaments
Cross-bridges
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cross bridges are not released causing the muscles to become rigid; ATP not available
Rigor moris
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TRUE OR FALSE
Myofilaments do not change length during muscle contraction
True
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TRUE OR FALSE
Actin myofilaments moves away from each other
False - toward
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TRUE OR FALSE
Sarcomere shorten as Z disks move toward each other
True
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TRUE OR FALSE
H zone, I band, A band NARROWS
False - A band DONT narrow
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It is a contraction of a muscle fiber in responds to a stimulus
Muscle twitch
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it is a time between the application of a stimulus and the beginning of contraction; LATENT phase
Lag phase
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phase/time during which the muscle contracts
Contraction phase
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time during a muscle relaxes
Relaxation phase
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sustained contraction that occurs when the frequency of stimulation is so rapid that no relaxation occurs
Tetanus
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this requires O2 and it breaks down glucose to produce ATP, CO2, heat
Aerobic respiration
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