How many muscles are typically involved in moving a single bone in the human body?

In general, the movement of a single bone in the body is facilitated by two main types of muscles: flexor muscles and extensor muscles.

Flexor muscles are responsible for bending joints, while extensor muscles are responsible for straightening joints. For example, when you bend your elbow to lift a weight, your biceps muscle is the flexor, and your triceps muscle is the extensor.

Therefore, the correct answer is option 2, since the movement of a single bone typically requires the coordinated action of both a flexor and an extensor muscle. However, in some cases, additional muscles may also be involved in providing support or fine-tuning the movement.