Parts of Muscle Tissue

13 terms by keeperskilz 

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Sarcolemma

cell membrane

sarcoplasm

cytoplasm

Transverse Tubules

have openings in sarcolemma; contain intercellular fluid; go into muscle cells like tunnels

Sarcoplasmic Reticulum

Specialized ET; has cisternae

Cisternae

chambers encirling myofibrils; filled with Ca

Triads

T Tubule sandwiched between cisternae

Mitochondria

provide chemical energy in the form of ATP

Myofibrils

100's to 1000's per cell; cylidrical (1-2 mm in diameter); attached to sarcolemma at each end; contraction shortens entire cell; made of myofilaments (protein fibers); 2 types actin and myosin

Actin

thinner; have active sites

Myosin

thicker; head pivots

Sarcomere

smalles fuctional unit of contraction; from Z line to Z line

A Band

where myosin is; dArk band

I Band

where myosin isnt; light band

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