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How does a B cell tell the difference between an invader cell and a body cell?
Antigens work as bar-codes to help the immune system differentiate between body cells and pathogens. Normally the body will not attack its own cells, but is programmed to attack those with foreign antigens.
What typoes of cells produce antigens?
All cells produce antigens, or cell surface markers. The only question is whether the antigens are self antigens which means they belong in the body or they're foreign antigens which means they are an invading bacteria or virus (or a cancerous cell).
When the antibodies in the patient's serum attack antigens on the erythrocytes in donor blood this is known as?
When the antibodies in the patient's serum attack antigens on the erythrocytes in donor blood, this is known as red blood cell incompatibility. Patients should receive blood with the same ABO and Rh(D) classification. A and B are dissimilar antigens on the red cells. The immune system recognizes antigens as foreign. O cells do not have A or B antigens.
What type of leukocyte recognizes body cells with abnormal membranes?
cell membrane
What recognize a hormone's chemical structure?
A target cell is a cell in the body that recognizes a hormone's chemical structure. It is a cell to which a hormone binds chemically.
Why is blood type is the universal donor?
AB isn't the universal donor, O is. AB is a universal acceptor because RBC (red blood cells) contain the A and B antigen (simply put, it is a marker on the cell) so the body accepts any blood type because it recognizes the antigens. O is the universal donor because it contains no antigens, so no immune system will attack it.
Why is blood type AB the universal donor?
AB isn't the universal donor, O is. AB is a universal acceptor because RBC (red blood cells) contain the A and B antigen (simply put, it is a marker on the cell) so the body accepts any blood type because it recognizes the antigens. O is the universal donor because it contains no antigens, so no immune system will attack it.
What are molecules on the outer surface of a cell that identify it as long friend or for?
Molecules on the outer surface of a cell that identify it as "self" or "foreign" are called antigens. These antigens play a crucial role in the cell's ability to distinguish between its own cells and potentially harmful foreign cells. The recognition of self-antigens helps the immune system to tolerate the body's own cells while identifying and attacking foreign invaders.
What happens to an antigen-antibody complex?
The antigen grows a memory cell instead of the Plasma cell and takes over the whole body and kills all of the antibodies.
Antigens are typically present on what?
Antigens are typically present on any cell, bacterium, or virus.
Antigens are chemical agents that fight cell destroying free radicals?
Antigens are actually molecules that trigger an immune response in the body by activating the production of antibodies. Free radicals are unstable molecules that can cause damage to cells and are often neutralized by antioxidants, not antigens.
What is the difference between type a blood cells and type b cell?
Type A and B red blood cells differ in the antigens they express on the cell surface. The still carry out the same tasks (transportation). The antigens on the surface of these cells are what is recognised by the immune system - so that it knows the cell is part of the body and not foreign.
