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Muscular System

QuestionAnswer
Tendon connective tissue that surrounds each muscle
Aponeuross fibourous sheets
Myofibrils abundant parallel , thread-like structures.
Myosin Protein that causes muscle contraction.
Actin Protein that shortens muscle fibers.
Sacromeres structural and functional unit of a myofibril.
Neurotransmitters Chemical that an axon end secretes.
Motor Neurons Neuron that conducts impulses.
Neuromuscular Junction Synapse between a motor neuron and a skeletal muscle fiber.
Acetylcholine a type of neurotransmitter
sliding filament model muscles shorten, pulling on muscle ends
ATPase enzymes that transfer the energy.
Acetylcholinesterse Enzymes that catalyze breakdown
Creatine phosphate molecule in muscle that stores energy
Myoglobin Oxygen storing pigment in muscle tissue
Lactic Acid Threshold a shift in metabolism
Oxygen Debt amount of oxygen required by muscle cells
Threshold Stimulus stimulation level that must be reached.
Twitch brief contraction of a muscle fiber followed by relaxation
muscle tone on going contraction of fibers.
Isometric contraction that changes muscle length
Levers mechanical device
Origin end of muscle that attachments to unmovable parts.
insertion end of muscle attached to movable parts
Agonist a muscle that causes an action
Synergists a muscle that assists the action of agonists
prime mover muscle that provides most of the force for body movement
antagonist a muscle that opposes an action
Created by: Bri_04