GED Science : Immune System
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Example Question #1 : Immune System
Which cell type secretes antibodies that attach to pathogens in the body?
B-cell lymphocytes
Red blood cells
Macrophages
T-cell lymphocytes
B-cell lymphocytes
B-cell lymphocytes are responsible for the production of antibodies. These white blood cells secrete antibodies, which bind to and promote the destruction of pathogens
Macrophages attack pathogens directly. T-cell lymphocytes can help attack pathogens as well, and can also trigger B-cells to release antibodies. Red blood cells (erythrocytes) are not involved in the immune response.
Example Question #2 : Immune System
What blood type could not be given to a person with type A blood in a transfusion?
O blood
AB blood
They can receive any of these blood types
A blood
AB blood
When it comes to blood type, the type of blood you have is determined by the type of antigens present on your red blood cells. For example, people with type A blood have the A antigen on their red blood cells, but not the B antigen. People with O blood have no antigens on their red blood cells. The immune system of a person with A blood will respond negatively to B blood if it is introduced into the body.
A person with type A blood could receive type A blood (A antigens) or type O blood (no antigens), but could not receive type B blood (B antigens) or type AB blood (A and B antigens).
Example Question #3 : Immune System
What is the function of the innate immune system?
Attack pathogens that enter the body through the mouth or nose
Attack pathogens that the body has been exposed to during previous infection
Attack all pathogens that enter the body
Attack pathogens that the body is exposed to before birth
Attack all pathogens that enter the body
Your innate immunity is the generalized system responsible for first attacking incoming infectious agents and toxins. Innate means that it is not necessary to have previously seen the pathogen, and the body always has these general defense mechanisms. Macrophages, neutrophils, and basophils are some of the primary cell types of innate immunity.
In contrast, the adaptive immune system is only effective against pathogens that have previously entered the body. A previous infection will result in the body producing antibodies during any later infections. T-cells and B-cells (lymphocytes) are the primary cell types of adaptive immunity.
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