Studied by 8 people
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Actin
Thin protein that forms (together with myosin) filaments of muscle cells
Atrophy
The wasting or thinning of a muscle or body tissue
Biopsy
a procedure to remove a piece of tissue or a sample of cells from your body so that it can be tested in a laboratory
Endomysium
a wispy layer of areolar connective tissue that ensheaths each individual muscle fiber, or muscle cell
Epimysium
the dense connective tissue that surrounds the entire muscle tissue
Extensors
A muscle whose contraction extends or straightens the limb
Fascicles
Muscle fibers that are grouped in bundles
Flexors
A muscle whose contraction bends a limb or other part of the body
Hypertrophy
Excessive development of an organ or part
Insertion
Attachment to moveable bone
Muscle fibers
A skeletal muscle cell
Muscle tone
the resistance of a muscle to active or passive stretch, or the overall stiffness of the muscle
Myofibrils
a basic rod-like organelle of a muscle cell
Myofilaments
Contracting proteins in the myofibers that are arranged into groups
Myosin
Thick myofilaments that converts chemical energy into ATP
Neuromuscular junction
a synaptic connection between the terminal end of a motor nerve and a muscle
Neurotransmitter
endogenous chemicals that allow neurons to communicate with each other throughout the body
Origin
the attachment to immovable bone
Perimysium
a continuous layer of collagenous connective tissue that separates the skeletal muscle tissue into muscle fascicles
Sarcolemma
the fine, delicate, extensible membrane surrounding each muscle fiber
Sarcomere
the main contractile unit of muscle fiber in the skeletal muscle. (composed of myofilaments that include mainly myosin and actin)
Sarcoplasm
The cytoplasm of muscle fibers
Synaptic Cleft
the region between the axon (presynaptic or sending neuron) and dendrites (postsynaptic or receiving neuron)
Transverse Tubules
a network of interconnecting rings, each of which surrounds a myofibril.
Twitch
A single brief contraction, not a normal muscle function
