HB+Blood+Unit

=__Blood__= = =


 * transports hormones, oxygen, and nutrients to cells
 * transports carbon dioxide and other wastes from cells
 * fights infections and has various regulatory functions
 * maintains blood pressure
 * regulates body temperature
 * keeps ph of bodily fluids within normal limits

What is the composition of plasma and what are the functions of plasma proteins?

 * Over 90% of Blood Plasma is water. Plasma proteins maintain osmotic pressure, help regulate pH, and transport molecules.

What substances allow red blood cells (RBCs) to transport oxygen?

 * Red Blood Cell production is controlled by the oxygen concentration of the blood. When the oxygen concentration decreses, the kidneys increase their production of erythropoietin, and more red blood cells are produced.

Why do RBCs have a biconcave shape?
They are shaped like biconcave because they lose the nucleus during maturation.

Name and describe three disorders associated with RBCs.

 * Anemia, Hemolysis and Sickle-cell disease are all disorders associated with red blood cells.

What are the different blood types and what determines blood type?

 * ABO Blood typing determines the presence or absence of type A antigen and type B antigen on the surface of red blood cells. The different typings are A, B, AB, and O.

When does hemolytic disease in a newborn occur?

 * If a mother is RH+ and a father is RH-, a child can be RH+. During a pregnancy RH+ can leak across the placenta into the mothers bloodstream. The presence of these RH+ antigens causes the mother to produce anti-RH antibodies. This process can cause the destruction of the child's red blood cells.

Tell how the functions of the cardiovascular system contribute to homeostasis?

 * All systems of the body work with the cardiovascular system to maintain homeostasis.