levers Flashcards
1
Q
what is a lever made up of
A
fulcrum
effort
resistance
2
Q
what is a fulcrum
A
the part of the lever that pivots
joints are fulcrums in the body
3
Q
what is effort
A
the force applied to move the resistance or weight
in the body the effort is provided by muscles exerting a force
4
Q
what is resistance
A
the load to be moved by a lever system
5
Q
what is a first class lever
A
there is only one first class lever
found at the elbow joint where the triceps cause extension pf the lower arm
6
Q
what is a second class lever
A
there is only one second class lever
found at the ankle where the gastrocnemius causes plantar flexion
7
Q
what is a third class lever
A
the majority of the body joints act as third class levers e.g. the biceps acting at the elbow to cause flexion
