晴の天空

What-does-a-doctor-do Most likely, you’re already at least a little familiar with the work of a doctor: Doctors and physicians help people be healthy! Have you ever thought about becoming a doctor when you grow up? Lots of people cite similar reasons for becoming doctors: Wanting to help people!    Being a doctor comes with a lot of responsibility. A doctor’s patients rely on their physician for the best medical help possible! Because of this, doctors must go through a lot of school and training before they can practice medicine; in the U.S., it takes between 11-16 years of studying!  There are lots of different kinds of doctors. General Practitioners, Family Doctors, and Pediatricians (doctors just-for-kids) are the types most people see on a regular basis for things like the flu, a fever, a check-up or physical, a vaccination, and other common needs. Other doctors specialize in specific health fields or particular body systems. Some examples of specia...

MA is associated with an abnormal appearance of the BM erythroblasts in which nuclear development is delayed and nuclear chromatin has a lacy open appearance. There is a defect in DNA synthesis, usually caused by deficiency of Vitamin B12 or Folate . Vit B12 deficiency Adult daily requirement for B12 is 1ug (normal mixed diet=10-15ug) It is present only in foods of animal origin eg meat, fish, eggs, milk, butter; it is absent from vegetables eg cereals and fruits, unless contaminated by microorganisms. Normal body stores of B12, largely in the liver with an enterohepatic circulation, are sufficient to last for 2-4 years. Dietary B12 after release from food and gastric (R) binder combines with intrinsic factor (IF) secreted by gastric parietal cells. IF-B12 complex attaches to ileal receptors and B12 is absorbed. Passive absorption (about 0.1% of oral B12) occurs through buccal, gastric and duodenal mucosae. Absorbed B12 attaches to transcobalamin II which carries B12 in plas...