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19 notecards = 5 pages (4 cards per page)

Viewing:

Microscopic Anatomy and Organization of Skeletal Muscle

front 1

Skeletal Muscle/Voluntary Muscle

back 1

-attaches to the skeleton
-shapes the body and gives you the ability to move
-most of the muscle tissue in the body
-consciously controlled
-striated

front 2

Fibers

back 2

-large, long cylindrical cells that makes up skeletal muscle
-multinucleated

front 3

Sarcolemma

back 3

-membrane enclosing a striated muscle fiber

front 4

Myofibrils

back 4

-a contractile fibril of skeletal muscle
-made up of myofilaments

front 5

Myofilaments

back 5

-composed of actin and myosin, which slide past each other during muscle activity to bring about shortening and contracting of the muscle cells

front 6

Sarcomere

back 6

-contractile units of muscle
-extends from the middle of one I band (its Z disc) to the middle of the next along the length of the myofibrils

front 7

Transverse Tubule (t tubule)

back 7

-deep invagination of the sarcolemma

front 8

Terminal Cisterns

back 8

-pairs of tranversely oriented channels that are confluent with the sarcotubules, which together with an intermediate T tubule constitute a triad of skeletal muscle

front 9

Triads

back 9

-regions where the sarcoplasmic reticulum terminal borders a t tubule on each side.

front 10

Endomysium

back 10

-delicate areolar connective tissue that encloses each muscle fiber

front 11

Perimysium

back 11

-collagenic membrane surrounding several muscle fibers

front 12

Fascicle

back 12

-bundle of fibers

front 13

Epimysium

back 13

- large number of fascicles bounded together by dense connective tissue

front 14

Deep Fascia

back 14

-coarser sheets of dense connective tissue that bind muscles into functional groups

front 15

Insertion

back 15

-a muscles more movable attachment

front 16

Origin

back 16

- a muscles immovable attachment

front 17

Neuromuscular/Myoneural Junction

back 17

- junction between an axon of a motor neuron and a muscle cell

front 18

Motor Unit

back 18

-a neuron and all the muscle fibers it stimulates

front 19

Synaptic Cleft

back 19

-small fluid-filled gap separating the neuron and muscle fiber membranes