1 Secretion of erythropoietin, which regulates red blood cell production in the bone marrow. 2  Secretion of renin, which is a key part of the reninâangiotensinâaldosterone system. 3  Secretion of the active form of vitamin D (calcitriol) and prostaglandins.
A: A charter school is a public school that is organized and operated according to the terms of the. charter, or contract. A charter school cannot have admissions criteria or charge tuition. A private school is not subject to state school laws, local board of education policies, or State Board of Education rules.
Public Schools vs. Charter Schools This article explains the relationship of public schools and charter schools. If you are considering sending your child to a public or charter school, read this article to learn more about public schools in general and charter schools in particular. Charter schools are actually one type of public school, but they have so much in common with private schools, that many people think of them as being in a separate category. Hereâs an explanation of the different types of public school, and how charter schools fit in with the rest. Public Schools: the Numbers.