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.
Grade Level: All NYS certificates are issued for work in specific grade levels. These include early childhood (birth to grade two), childhood (grades 1-6), middle childhood (grades 5-9), adolescent (grades 7-12), and all grades (pre-kindergarten to grade 12).