Question

Which is produced in primary immune response?
a) IgA
b) IgE
c) IgM
d) IgG

Answer 1

Immune system is one of the independently working systems of the body of an organism. This system helps the body to fight against unwanted harmful microorganisms and thus ensure good health of the individual. All living organisms have their own immune system.

Complete answer:
The immune system when it comes in action acts in two major steps. The first step is the primary response and the second step is called the secondary response. When any microbe is encountered by the immune system for the first time then response produced is primarily. This response is quite stronger. Whereas, after that every reaction produced for that particular organism is secondary which is generally mild as the body has already prepared itself to tackle this organism out.
Immunoglobulin A is an antibody that comes in action for mucosal layered organs such as intestines. It is the second antibody to appear after activation of the immune system. Thus, it's an incorrect option.
Immunoglobulin E that is found to activate in case of allergies. Thus, it fights against parasitic microbes. It is also a secondary antibody thus option B stands to be an incorrect option.
Immunoglobulin M is another antibody that is produced by our immune system in every threatening situation irrespective of the nature of the situation. Thus, it is the main antibody which is the first one to appear. It is produced as a primary response therefore is the correct option.
Immunoglobulin G is also an antibody that is produced to fight against very hard diseases. Increase in its level determines serious health issues. It is obviously produced as the secondary response by the immune system. Therefore, it is an incorrect option.

Note:
The immune system uses several organs, cells, chemicals and hormones to fight against these microorganisms. They work exactly like soldiers to tackle the enemy organism. The main participants of this system are WBCs (White Blood Cells), lymphatic system, thymus, spleen, bone marrow and antibodies as well.