1. (a) Define mechanical advantage and disadvantage. (b) Give an example of a lever in the body that only works at a mechanical disadvantage. 2. List all six possible movements of the humerus that can...

1. (a) Define mechanical advantage and disadvantage. (b) Give an example of a lever in the body that only works at a mechanical disadvantage.

2. List all six possible movements of the humerus that can occur at the shoulder joint, and name the prime mover(s) of each movement.