Muscle Part 1 and 2 Vocab

Deep Fascia

a dense, tough layer of fibrous connective tissue that wraps around and separates muscles, bones, nerves, and blood vessels throughout the body

Motor Neuron

specialized nerve cells that transmit electrical signals from the brain and spinal cord to muscles and glands to control voluntary and involuntary movements

Motor Unit

specialized nerve cells that transmit electrical signals from the brain and spinal cord to muscles and glands to control voluntary and involuntary movements

Myoblast

Undifferentiated muscle cell with the potential of becoming a muscle fiber.

Muscle Fiber

Skeletal muscle cell.

Sarcolemma

Plasma membrane of a muscle cell

Terminal Cisternae

large, flat sacs of the sarcoplasmic reticulum in muscle cells that store and release calcium ions to trigger muscle contraction

Sacroplasmic Reticulum

T-tubule

Myofibril

Myofilament

Thick Filament

Thin Filament

M line

Z disks

synaptic knob

Postsynaptic Knob (Motor end plate)