NUTRITION
THE HUMAN BODY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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In the neck
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In the ankle area
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in the hand
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In the kidney
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Detailed explanation-1: -An example of a first class lever in the human body is the head and neck during neck extension. The fulcrum (atlanto-occipital joint) is in between the load (front of the skull) and the effort (neck extensor muscles). The muscles are attached to the posterior part of the skull to allow for the greatest effort arm.
Detailed explanation-2: -However, there are other orientations or classes of levers. A wheelbarrow is a good example of a class 2 lever, and our jaws and arms are both examples of class 3 levers.
Detailed explanation-3: -First Class Levers If the fulcrum is closer to the effort, then more effort is needed to move the load a greater distance. A teeter-totter, a car jack, and a crowbar are all examples of first class levers. First class levers are very useful for lifting large loads with little effort.