Muscle Chapter Test

sarcomere

basic functional unit of the muscle fibers

myofibrils

composed of actin and mysoin

impulse that triggers contraction travels to muscle fibers by

myofibrils

a motor unit includes

several muscle fiber and one motor neuron

ATP is needed to move what back into the SR

calcium

Immovable end of the muscle is the

origin

Tough outer covering on muscle trunk

fascia

During muscle contraction ATP binds to

myosin

Aponeurosis

fibrous sheet which attaches to nearby muscles

Muscles

connect to bones by tendon

End of muscle that attaches to movable bone insertion 

Actin proteins

think and stringy 

ER of muscle cells is AKA

sarcoplasmic R.

Small band of CT on the rectus abdominis

Aponeurosis

Structure of myosin

paddles

Actin is the only fiber present in the z-line

Actin and myosin both found in a band

Sarcomere extends z line to z line

What doesn’t happen in muscle contraction

thick and thin filaments bind to each other

Process aids in skeletal muscle relaxation

Ach-ase decrease Ach 

t/f Skeletal muscle need stuff

Perimisium and epimysium

True

Tendons are at both ends 

False

False

Cell in muscle tissue is fiber true

transverse tubules have hollow area called

systernae

false

sarcolemma aka

cell membrane