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What are the antigen-presenting cells of the immune system?
The antigen-presenting cells of the immune system, also called as APC cells, are cells that do phagocytosis and digestion 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. Various types of cells, as the macrophages, can act as antigen-presenting cells.
The Immune System - Image Diversity: antigen-presenting cells
Explain Food Sources of lron? lron is found in foods in one of the two forms i.e. haem or non-haem. In the human diet, the primary sources of haem iron are the haemoglobin and
How do chloroplasts multiply? Like mitochondria chloroplasts have their own DNA, RNA and ribosomes and they self-replicate through binary division.
Point and Non-Point Sources The discharge of effluents in receiving water body at a specific site are referred to a point sources in contrast to the inflow of pollutants in a
Concerning digestion how are poriferans characterized? Sponges are dissimilar from other animals since they present only intracellular digestion. They do not have a digestiv
List er i o si s The disease is caused by Listeria monocytogenes - Gram positive small non spore- forming bacilli seen in soil, silage, sewage and feces of animals and b
Define the LTLT Pasteurization Method? In LTLT pasteurization, the pasteurization time is in the order of minutes and related to the temperature used; two typical temperature/t
PURPOSE OF EVALUATION: The purpose of evaluation of service is to answer the questions, "To what extent and how well did the programme meet the objectives of the service?'
Low levels of dissolved salts characterise the freshwater biomes. The salt content of fresh water is about 0.005 percent. The freshwater biomes consist of inland bodies of standing
Q. What is the valve that separates the duodenum from the stomach called? What is its function? The valve that separates the stomach from the duodenum is the pylorus it has the
Explain the life cycle of Water? The water cycle , or hydrologic cycle, is one of the most important processes to living organisms on Earth. Consider the following facts:
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