Serum iron in other molecules in cells throughout the body. None of this iron is directly accessible by testing the serum. However, some iron is circulating in the serum. Transferrin is a molecule produced by the liver that binds one or two iron(III) ions, i.e. ferric iron, Fe; transferrin is essential if stored iron is to be moved and used. Most of the time, about 30% of the available sites on the transferrin molecule are filled. The test for serum iron uses blood drawn from veins to measure the iron molecules that are bound to transferrin, and circulating in the blood. The
Blood, Sweat & Tea Blood, Sweat & Tea Blood, Sweat & Tea is a book by ambulance technician Brian Kellett, writing under the pseudonym Tom Reynolds, about life in the London Ambulance Service. The book is compiled from posts and correspondence from the blog Random Acts of Reality, one of the earliest high-readership blogs in England. The book covers Reynolds's career from 2003–2006, and discusses his career as an emergency medical technician and a rapid responder. Although often extremely critical of NHS policies and management, the book was extremely well received within the European emergency services, and the book (with its associated blog) is