Most Levers in the Human Body Are

Question

Most levers in the human body are:
A)first-class levers.
B)second-class levers.
C)third-class levers.
D)fourth-class levers.

Accepted Answer

The majority of levers in the human body are third-class levers, where the effort is between the load and the fulcrum. Examples include bicep curls and hamstring curls. Second-class levers are less common, where the load is between the effort and the fulcrum, such as standing on tiptoes. First-class levers are also rare in the body, where the fulcrum is between the effort and load, such as nodding the head. Fourth-class levers, where the load is between the effort and fulcrum, are not classified as true levers and are not commonly found in the body.