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Irritability
The ability of the muscle to respond to a stimulus
Antagonists
Oppose agonists
Eccentric
Muscle fibre lengthen
Epiphysis
Ends of long bones
Ossification
The process of creating new boen
Contractility
Ability to shorten when adenquately stimulated
Synergists
Assist prime movers
Isometric
Muscle fibres do not change in length
Epiphysial line
Calcified line of a long bone
Closed fracture
When the bone breaks cleanly but does not penetrate the skin
Extensibility
Ability to extend in length
Fixator
Muscle which acts as a stabilizer and helps agonist muscle to work effectively
Axial skeleton
The bones that form the longitudinal axis of the body
Osteoblasts
cells that Builds new bone
Open fracture
When the broken bone penetrates the skin
Elasticity
Ability to resume their resting state after being streched
Motor unit
All muscle cells innervated by one motor neuron
appendicular skeleton
The bones of the limbs and girdles that are attached to the axial skelectron
Osteoclasts
Cells that destroy old bone
Prime movers
Bring about an action
Concentric
Muscle fibres shorten
Diaphysis
The shaft of long bone
Osteocytes
Bone cell