MUSCLE LMQ

EPIMYSIA BLEND INTO COARSE SHEETS OF CONNECTIVE TISSUE CALLED __________ THAT BIND MUSCLES INTO FUNCTIONAL GROUPS

deep fascia

GIVE THE FUNCTION OF SYNERGISTS

aids angonists by reducing unnecessary movements

NAME TWO CRITERIA (WAYS) USED TO CLASSIFY / NAME MUSCLES

location, shape, direction, action

NAME TWO DESCRIPTIVE TERMS USED WHEN CLASSIFYING MUSCLES BY THEIR NUMBER OF ORIGINS

biceps, triceps, quadriceps

NAME TWO DESCRIPTIVE TERMS USED WHEN CLASSIFYING MUSCLES BY THEIR RELATIVE SIZE

longus, brevis, maximus, minimus

NAME TWO DESCRIPTIVE TERMS USED WHEN CLASSIFYING MUSCLES BY THE DIRECTION OF THEIR MUSCLE FIBERS

rectus, transverse, oblique

EACH MOTOR NEURON AXON BREAKS UP INTO MANY BRANCHES CALLED _____________

axon terminals

THE JUNCTION BETWEEN AN AXON AND A MUSCLE CELL IS CALLED _______________

neuromuscular junction

THE BULK OF THE BODY’S MUSCLE IS COMPOSED OF WHICH MUSCLE TYPE?

skeletal

THE FLUID-FILLED GAP SEPARATING NEURONAL AND MUSCLE FIBER MEMBRANES IS CALLED

synaptic cleft

EPIMYSIA BLEND INTO STRONG CORD-LIKE STRUCTURES CALLED ___________

tendons

EPIMYSIA BLEND INTO STRONG FLAT/ SHEET-LIKE STRUCTURES CALLED ___________

aponeuroses

GIVE THE TWO OTHER NAMES BY WHICH SKELETAL MUSCLES ARE KNOWN ( HINT: CONTROL/ APPEARANCE)

voluntary, striated

SKELETAL MUSCLE IS COMPOSED OF RELATIVELY LARGE, LONG CYLINDRICAL CELLS, SOMETIMES CALLED

muscle fibers

GIVE THE RANGE OF MUSCLE FIBER DIAMETER

10 -100 micrometers

GIVE THE RANGE OF MUSCLE FIBER LENGTH

a few mm up to 30 cm

MUSCLE CELLS ARE BUNDLES OF ________

myofibrils

MYOFIBRILS ARE MADE UP OF EVEN SMALLER THREAD-LIKE STRUCTURES CALLED ______________

myofilaments

WHAT CHANNEL IS CONTINUOUS WITH THE SARCOLEMMA AND PROPOGATES THE ACTION POTENTIAL CLOSE TO THE SARCOPLASMIC RETICULUM?

transverse tubule

A LARGE NUMBER OF FASCICLES ARE BOUND TOGETHER BY A COARSE "OVERCOAT" OF DENSE CONNECTIVE TISSUE CALLED THE ______________, WHICH SHEATHS THE ENTIRE MUSCLE.

epimysium

GIVE THE FUNCTION OF AGONISTS

primarily responsible for producing particular movement

GIVE THE FUNCTION OF AN ANTAGONIST

responsible for producing reverse movement

GIVE THE FUNCTION OF FIXATORS

immobilize origin of agonist

WHAT IS THE EFFECT OF AGING ON MUSCLES, WHAT HAPPENS TO THEM

muscle fibers mass decreases, amount of connective tissue increases, skeletal muscles become more sinewy

THE TRANSVERSE TUBULE AND THE TWO TERMINAL CISTERNAE ON EITHER SIDE FORM A REGION CALLED A

triad

A MUSCLE’S FIXED (IMMOVABLE) SITE OF ATTACHMENT IS CALLED ITS

origin

SEVERAL SHEATHED MUSCLE FIBERS ARE WRAPPED TOGETHER BY A COLLAGENIC MEMBRANE CALLED?

perimysium

____________ ARE THE ACTUAL CONTRACTILE UNITS OF A MUSCLE

sarcomeres

THE _______________ IS THE AREOLAR CONNECTIVE TISSUE LAYER SURROUNDING EACH INDIVIDUAL MUSCLE FIBER

endomysium

A BUNDLE OF SEVERAL SHEATHED MUSCLE FIBERS, WRAPPED TOGETHER BY A COLLAGENIC MEMBRANE, ARE CALLED A ________________

fasicle

A MUSCLE’S MORE MOVABLE SITE OF ATTACHMENT IS CALLED ITS

insertion

A NEURON AND ALL THE MUSCLE CELLS IT STIMULATES MAKE UP THE FUNCTIONAL STRUCTURE CALLED A

motor unit

WHAT IS THE ANATOMICAL NAME FOR THE THIN FILAMENTS OF THE MYOFIBRILS?

actin

WHAT IS THE ANATOMICAL NAME FOR THE THICK FILAMENTS OF THE MYOFIBRILS?

myosin

WHAT PART OF THE SARCOPLASMIC RETICULUM IS IN CLOSE PROXIMITY WITH THE TRANSVERSE TUBULE?

terminal cisternae

FOR WHAT IS THE SARCOPLASMIC RETICULUM A REPOSITORY?

calcium ions

HOW MANY THIN FILAMENTS SURROUND EVERY THICK FILAMENT IN EACH MYOFIBRIL?

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HOW MANY THICK FILAMENTS SURROUND EVERY THIN FILAMENT IN EACH MYOFIBRIL?

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