OVERVIEW OF THE IMMUNE SYSTEM
THE GOOD BAD AND UGLY OF THE IMMUNE SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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antigens present on the invaders
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antibodies present in invading pathogens
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DNA pattern in the nuclei of viruses
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antibiotics released from microbes
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Detailed explanation-1: -The immune system recognizes invaders by their antigens, which are proteins on the surface of the invading cells (see Figure 1). Every cell or substance has its own specific antigens, and a person’s cells carry “self-antigens” that are unique to that individual.
Detailed explanation-2: -Adaptive immune responses are carried out by white blood cells called lymphocytes. There are two broad classes of such responses-antibody responses and cell-mediated immune responses, and they are carried out by different classes of lymphocytes, called B cells and T cells, respectively.
Detailed explanation-3: -Special white blood cells called lymphocytes play a key role in the immune system’s response to foreign invaders.
Detailed explanation-4: -When the body senses foreign substances (called antigens), the immune system works to recognize the antigens and get rid of them. B lymphocytes are triggered to make antibodies (also called immunoglobulins). These proteins lock onto specific antigens.