Question: the dense layer of connective tissue that surrounds an entire skeletal muscle is the

epimysium.

fascicle.

perimysium.

tendon.

endomysium.

Answer: epimysium

Question: The delicate connective tissue that surrounds the skeletal muscle fibers and ties adjacent muscle fibers together is the

superficial fascia.

endomysium.

perimysium.

periosteum.

epimysium

Answer: endomysium

Question: An ________ can be described as a broad tendinous sheet

Answer: apineurosis

Question: The repeating unit of a skeletal muscle fiber is the

myofibril.

sarcoplasmic reticulum.

myofilament.

sarcolemma.

sarcomere

Answer: sarcomere

Question: The plasma membrane of a skeletal muscle fiber is called the

sarcoplasm.

sarcoplasmic reticulum.

sarcosome.

sarcolemma.

sarcomere.

Answer: sarcolemma

Question: The region of the sarcomere containing the thick filaments is the

I band.

A band.

M line.

H band.

Z line.

Answer: A band

Question: At rest, the tropomyosin molecule is held in place by

myosin molecules.

troponin molecules.

ATP molecules.

actin molecules.

calcium ions.

Answer: troponin molecules

Question: The area in the center of the A band that contains no thin filaments is the

I band.

M line.

H band.

zone of overlap.

Z line.

Answer: h band

Question: Each thin filament consists of

chains of myosin molecules.

a rod-shaped structure with “heads” projecting from each end.

a double strand of myosin molecules.

two actin protein strands coiled helically around each other.

six molecules coiled into a helical structure

Answer: two actin protein strands coiled helically around eachother

Question: At rest, active sites on the actin are blocked by

calcium ions.

ATP molecules.

myosin molecules.

tropomyosin molecules.

troponin molecules.

Answer: tropomysosin molecules