(2) A motor neuron in the ventral horn of the spinal cord is activated, and an action potential passes outward in a ventral root of the spinal cord. (3) The axon branches to supply a number of muscle fibers called a motor unit, and the action potential is conveyed to a motor end plate on each muscle fiber.
The average male height varies from country to country. The estimated average height for the human male across the world is approximately 5ft 8 1/2in (1.73 m.) According to John Komlos of the University of Munich, North Americans were the tallest people on the planet from about the American Revolution to World War II.
the average height for an asian male can be from 5,2 to 5,9 this depends on where they are from, for example a chinese male has and average of being 5,7 or less. Minor edit?he average height of the Persian male is between 5 feet 5 inches  tall and 5 feet 8 inches tall. The Persian male are known of being  of average height.