The arrow pathway from muscle to gray matter illustrated in figure 1 below is called a(an)

The correct answer is "knee j*rk reaction". The knee j*rk reaction is a type of reflex wherein nerve impulses from the muscle does not have to reach the brain for the appropriate motor response of the body. Reflexes are important as to shorten the response time especially in times when a long response time will harm the body.

This is the most closely resembles the model.