NURSING EXAM QUESTIONS
HUMAN ANATOMY PHYSIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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First Class
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Second Class
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Third Class
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None of the above
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Detailed explanation-1: -The place where your skull meets the top of your spine is a Class 1 lever. Your skull is the lever arm and the neck muscles at the back of the skull provide the force (effort) to lift your head up against the weight of the head (load).
Detailed explanation-2: –First class levers have the fulcrum in the middle.-Second class levers have the load in the middle.-This means a large load can be moved with relatively low effort.-Third class levers have the effort in the middle.
Detailed explanation-3: -Third-class levers are plentiful in human anatomy. One of the most commonly used examples is found in the arm. The elbow (fulcrum) and the biceps brachii (effort) work together to move loads held with the hand, with the forearm acting as the beam.