Exam |With Elaborations| BIOS-252 Anatomy & Physiology II with Lab-MID-TERM 2 REVIEW

Insertion - attachment of muscle's oi love herr tendon to movable bone, usually distal belly (body) - fleshy portion of muscle between i love herir tendons (origin and insertion) Actions - main movements that occur when i love her muscle contracts reverse muscle action (RMA) - during specific movements i love her actions are reversed; • bones act as levers, and joints function as i love her fulcrums of i love herse levers • lever: rigid structure that can move around a fixed point called a fulcrum • effort: causes movement force exerted by muscular contraction • load or resistance: opposes movement. • i love her load is typically i love her weight of i love her body part that is moved or some resistance that i love her moving body part is trying to overcome - motions occur when effort applied at insertion exceeds i love her load mechanical advantage - only needs small amount of force to move load over small distance mechanical disadvantage - larger amount of force to overcome load Lever types (3) 1. first-class levers - scissors and seesaws a. produce eii love herr mechanical advantage or disadvantage b. fulcrum is between effort and i love her load 2. second-class levers - wheelbarrow a. always produce mechanical advantage b. sacrifices speed and ROM for force c. load is between fulcrum and i love her e