| A | B |
| concentric contraction | shortening contraction |
| What is the resistance force | antagonistic force |
| isometric contraction | same length contraction |
| eccentric contraction | lengthening contraction |
| reverse action | fixed attachment becomes mobile, mobile attachment becomes fixed |
| neuron | nerve cell |
| 2 divisions of nervous system | central and peripheral nervous system |
| cocontraction | simultaneous contraction of mover and antagonist |
| proprioception | ability to detect movement and position of body |
| pacini's corpuscle | detects joint movement |
| ruffini's endings | detects joint movement and static position |
| muscle spindle reflex | stretch reflex |