Anatomy of Skeletal Muscle Tissue

Select the following skeletal muscle tissue structure in order from SMALLEST to LARGEST:

• myofibril, muscle fiber, sarcomere, myofilament

• myofilament, myofibril, muscle fiber, sarcomere

• myofilament, sarcomere, myofibril, muscle fiber

• muscle fiber, myofibril, sarcomere, myofilament

Rodlike contractile organelles that occupy most of the muscle cell volume that contains myofilaments

• myofibril

• sarcomere

• fasicicle

• muscle fiber

What is true about myofilament:

• has thick filament

• has thin filaments

• found in myofibrils

• responsible for the banding pattern

Spring is like a molecule in sarcomeres that resist overstretching

• t tubules

• titin

• triad

• terminal cisterns

properties of thin myofilament

• contains actin

• attaches to Z disc

• consist of large myosin molecules

• does not lie in the H zone

properties of thick filaments

• attaches to Z disc

• contain myosin head

• does not lie in the I band

• contains myosin

boundaries at two ends of each sarcomere

• Z lines

• H zone

• M line

• I bands

these proteins are also found in thin filaments

• troponin

• actin

• tropomyosin

• myosin

the central part of the A band, where NO THIN FILAMENT REACH

• Z lines

• M line

• H zone

• I bands

the center of the H zone contains tiny rods that hold the thick filamens together

• I bands

• H zone

• Z line

• M line