After atrial contraction is complete, the atrial pressure begins to fall causing a pressure gradient reversal across the AV valves. This causes the valves to float upward (pre-position) before closure. At this time, the ventricular volumes are maximal, which is termed the end-diastolic volume (EDV).
How do I obtain Underage Working Papers in New York State? I'm 16 years old. I got a job at a movie theater for the summer, but they require Working Papers (something they called a green card) in order for me to work, since I'm under the age of 18.
1 If you are 14 and 15 years old, you are issued these working papers because you are not allowed to work in a factory.  16-17 year olds (in school) - Your working papers are green. The difference between 14-15 year old working papers and 16-17 year old working papers is that you are allowed to work in a factory.