With the type of lever system exemplified by flexion of the elbow joint when an object is held in the hand, the
a. power arm of the lever is the distance between the elbow joint and the insertion of the biceps muscle.
b. load arm of the lever is the distance between the elbow joint and the hand.
c. velocity and distance moved by the hand is amplified at the expense of the biceps muscle having to exert considerably greater force than the actual load that is moved.
d. two of these answers.
e. all of these answers.
E
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