385 Exam 3, pt. 2 (levers)

lever systems

consist of an axis of rotation around which a ridge lever moves

fulcrum, resistance, effort

what are the 3 components of a lever?

muscle, gravity, joint, bone

motive torque = ______, resistive torque = _______, axis of rotation = _______, lever arm = _______

first class

which class of lever has the fulcrum at the middle? 

second class 

which class of lever has the resistance at the middle?

third class

which class of lever has the effort at the middle?

head and neck

what is an example of a first class lever in the body?

gastroc

what is an example of a second class lever in the body?

bicep curl, concentric

what is an example of a third class lever in the body?

third class lever

what is the most abundant lever type in the human body?

effort arm/resistance arm

the equation of mechanical advantage:

greater

a MA _______ than 1 is considered good

attach close to their joint

muscles are always at a mechanical disadvantage because they…

stress, deformation 

tendon can experience more _____ because it needs to transfer force, while a ligament can experience more ___________