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.
Work Certificates. Work certificates are required for children 14 to 15 years of age before they start employment at any job (other than in the entertainment industry) during the school year. Work certificates are required regardless of where a child attends school (public school, private school, charter school, home school).