The following steps are involved in muscle contraction: (1) The sequence of events leading to contraction is initiated somewhere in the central nervous system, either as voluntary activity from the brain or as reflex activity from the spinal cord.
The average Mexican man weighs 165 pounds and stands 5 feet 4 1/2 inches tall, while the median figures for Mexican women are 151 pounds and 5 feet 2 inches, according to a study released by a group representing Mexico's clothing industry.
Global Comparison of Average Adult Male Height. The average adult American male is 5 feet 9.5 inches tall, according to data collected by the Centers for Disease Control and Prevention between 2007 and 2010.