Skeletal Muscle Flashcards
What makes up skeletal muscle?
Large, long cylindrical cells called fibers
What makes up myofibrils?
Myofilaments, composed of actin and myosin
What is the basic functional unit of muscle?
Sarcomere
What surrounds each muscle fiber?
Endomysium
What surrounds several sheathed muscle fibers?
Perimysium
What are several sheathed muscle fibers together called?
Fascicle
What surrounds a group of fascicles?
Epimysium, which sheaths the entire muscle
What do tendons do?
Attach muscles to each other or indirectly to bones
Function of tendons
Provide durability and conserve space
What is the junction between an axon of a motor neuron and a muscle cell called?
Neuromuscular or myoneural junction
What is the functional structure of a neuron and all the muscle fibers it stimulates?
Motor unit
What is the small fluid filled gap between a neuron and muscle fiber membranes?
Synaptic cleft
