Q:

What is the reason that a 3rd class lever is ineffi cient?

belongs to book: Examination Questions and Answers in Basic Anatomy and Physiology|Martin Caon|| Chapter number:19| Question number:31

waelhammad

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2022-10-22

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What is the reason that a 3rd class lever is ineffi cient?

the muscle’s effort force is applied closer to the fulcrum than the load force.
the load force is applied closer to the fulcrum than the muscle’s effort force
the fulcrum separates the effort from the load
the load force is greater than the muscle’s effort force

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waelhammad

2022-10-22

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A: Consider fl exing the forearm using the biceps brachii. Its tendon is inserted on the radius bone very close to the elbow joint, while the load (the forearm is further away). Such an arrangement allows a short contraction of the biceps brachii to be converted to a large sweep of motion of the hand.

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