Question

Our muscles can act with our bones to form lever systems. The lever system that allows a bicep curl would be considered a _________ and the lever system that allows you to lift your head from your chest would be considered a __________. A 1st class lever; 2nd class lever B 2nd class lever; 1st class lever C 1st class lever; 3rd class lever D 3rd class lever; 1st class lever

Answer 1

D 3rd class lever; 1st class lever

Step-by-step explanation:

The biceps attaches between the fulcrum (the elbow joint) and the load, this means that the bicep curl uses a third-class lever.

The first-class lever is where the fulcrum is in the middle of the effort and the load. These types of levers are found in the neck when raising your head to head a football. The neck muscles provide the effort, the neck is the fulcrum, and the weight of the head is the load.