Which of the following requires the action of a first class lever in the body

The answer would be nodding.

First class lever refer to a lever on which the resistance exist in one one side of the fulcrum and an effort is made on the other side you can't get a reaction unless something else causes a reaction.

i think it's the first one because doctors aren't the ones who get rid of the old needles. most of them time it's not even doctors who give you shots, it's nurses.

li uzi vert       choose the one you think is better lil xan, lil uzi vert, or fetty wap

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