Unformatted text preview: tensor pulls one bone away from another. The triceps in the arm are flexors.
• The origin of a muscle is where it attaches to the bone that does not move. Biceps have their origin
on the humerus.
• The insertion of a muscle is where it attaches to the bone that moves. Biceps have their origin on
• Muscles only contract; they do not push.
• Many people believe that they can build muscle mass by eating lots of protein. However, muscles only grow
if there is a need for them to grow, and the need is in response to exercise. Muscle that are exercised (and
given time to rest and repair themselves) will add mass. Because the average American diet is already rich
in protein, it’s rare that people would need to add protein to their diets to grow musc...
View Full Document
This document was uploaded on 02/25/2014 for the course BIOLOGY 103 at Western Oregon University.
- Winter '09