Lecture unit 3

tendon

collagen from epimysium, perimysium, and endomysium that connects muscle to bone

force transmission

tension from muscle fibers that pulls on tendon and bone

aponeurosis

broad flat tendon

fascia

connective tissue sheets that help anchor and separate muscles beneath the skin

muscle fibers

muscle cells

large and elongated

sarcolema

cell mambrane of the muscle fiber

sarcomere

contraction unit within a myofibril

Sarcoplasm

Cytoplasm of muscle cell

Transmembrane potential

Inside of a cell is more negative than outside

Changing negativity

Causes contractions of the cell

T-Tubules

Narrow tubes that connect to the sarcolemma and travel throughout the muscle fiber

Actin

Thin filament

Myosin

Thin filament