Muscular System Vocab Review

Front

Membranous network of channels and tubules within a muscle fiber; corresponding to the endoplasmic reticulum of other cells

Back

Sarcoplasmic reticulum

Front

Protein in a muscle fiber that forms thin filaments that slide between thick filaments of the protein myosin, contracting muscle fibers

Back

Actin

Front

Small bundle of skeletal muscle fibers

Back

Fascicle

Front

A narrow extracellular space between two cells at a synapse

Back

Synaptic cleft

Front

Oxygen storing protein in muscle tissue

Back

Myoglobin

Front

The connective tissue that surrounds individual muscle fibers

Back

Endomysium

Front

The connective tissue that surrounds a fascicle of muscle fibers

Back

Perimysium

Front

The outer layer of connective tissue that surrounds an entire muscle

Back

Epimysium

Front

The functional unit of muscle contraction, consisting of a motor neuron and the muscle fibers it innervates

Back

Motor unit

Front

The part of the muscle fiber membrane that is involved in the transmission of the action potential

Back

Sarcolemma