Question

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

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. In a third - class lever, the effort is between the fulcrum and the load, which is the case for elbow flexion.

Answer:

B. 3rd