Question

elbow flexion is a _____ class lever.
a) 2nd
b) 1st
c) 3rd
d) 4th

Explanation:

In elbow flexion, the fulcrum is the elbow joint, the effort is applied by the biceps muscle, and the load is the weight of the forearm and anything it is holding. The effort is applied between the fulcrum and the load, which is characteristic of a third - class lever.

Answer:

C. 3rd