Please solve question 18.
Dear student,
Please find below the solution to the asked query
The external/foreign substance which causes allergy​ is called allergen. For example, pathogens, dust particles, pollens etc. When humans are exposed to the allegens, the immune system produce a hypersensitive response through the IgE antibody and this condition is called allergy. Some allergies can cause rashes of skin while some can cause redness of eye, running nose, cough etc. These sensitivities are called as allergic reactions.
Hope this information will clear your doubts about the topic.
Regards
Please find below the solution to the asked query
The external/foreign substance which causes allergy​ is called allergen. For example, pathogens, dust particles, pollens etc. When humans are exposed to the allegens, the immune system produce a hypersensitive response through the IgE antibody and this condition is called allergy. Some allergies can cause rashes of skin while some can cause redness of eye, running nose, cough etc. These sensitivities are called as allergic reactions.
Hope this information will clear your doubts about the topic.
Regards