Muscle terminology

What term applies to the biceps muscle causing the forearm to flex while the triceps stays relaxed?

What muscle term applies to this situation... A professional athlete in knee rehabilitation using a strength machine that sets the pace of his repetitions while accommodating to the force he applies when he exerts?

What muscle term best applies to this situation... a person holding the "up position" of a push up exercise for as long as they can?

What muscle term best applies to this situation... The hamstring muscles contracting at the last moment to prevent an injury as the knee approaches 180 degrees of knee extension during a sprint race.

What muscle term applies best... The trapezius hold the shoulder steady during a javelin throw?

Losing several inches of waist measurement by simply working the abdominal compression muscles for a period of time so that more motor units stay contracted constantly.

What muscle term best applies to this example... a former body builder whose muscles have lost several inches of diameter and have lost firmness?

A group of a 1000 muscle fibers activated by a single nerve is a ...

A muscle attachment on a bone that moves when the muscle is contracted.

Using a 45 pound dumbell that you control throughout the exercise of flexion is best described as...