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Q. What are the antigen-presenting cells of the immune system?
The antigen-presenting cells of the immune system also known as APC cells are cells that do digestion and phagocytosis of foreign (to the body) microorganisms and later expose antigens derived from these microorganisms in the outer side of their plasma membrane. These processed antigens are then recognized by lymphocytes that activate the immune response. Several kinds of cells, like the macrophages, can act as antigen-presenting cells.
A v i a n leukosis (Sarcoma group of retroviruses) This is a complex of viral diseases caused by an avian retrovirus with various manifestations such as lymphoid leukosis,
Assuming that the equilibrium potential for sodium ion across a skeletal muscle is +66 mv at a temperature of 37 degree celcius when the external concentration is 145 mM and the in
State the Variety of chemical and biological reactions Variety of chemical and biological reactions takes place leading to the formation of the solution phase. If we analyse th
Define the term - Sulphur Sulphur is found in small amounts in soil perhaps 0.15% only. A large part of sulphur used by plants comes from decomposing organic matter or from f
Where does cartilage occur in a joint and what is its function ?
Q. How different are the actions of antibodies against virus and against bacteria? Why is the cellular immune response activated in case of chronic viral infection? The antibod
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Discuss why Obelia is considered to be of special interest in Zoology as an animal showing an intermediate grade of organization.
Explain Sickle cell anemia If 4% of a people are born with a severe form of sickle cell anemia. what percent of population will be resistant to malaria in spite of carrying
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