How do coaches call in plays to quarterbacks?

The awnser for this question is both yes and no. Most quarterbacks do NOT call plays because they are both impatiant and inexperianced, however some experienced qb's do. A few examples are Payton Manning, Tom Brady, And Brett Favre. Sometimes though they can only call the type of play. For example on first and ten a team (vikings) go for a running play. It is up to Brett to chose to run in the middle, left, right, ect.