Final answer:
The term for lifting up in muscle function is 'levator,' an 'abductor' moves the leg away from the body, and 'gastrocnemius' is the largest muscle in the lower leg.
Step-by-step explanation:
The term used to describe a muscle's function that means to lift up is levator. When considering muscle names and their functions, it is important to note that certain terms imply specific actions.
For example, a muscle that moves the leg away from the body is called an abductor, and the principal muscle involved in an action is known as the prime mover, or agonist. An example of a prime mover is the biceps brachii when lifting a cup. A synergist, such as the brachialis, may assist the prime mover. On a related note, the largest muscle in the lower leg is the gastrocnemius. Clearly understanding the terminology related to muscle function, origin, and insertion can provide greater insight into human anatomy and the biomechanics of movement.