Question

At the new place, a person suddenly starts sneezing and wheezing. The statements CORRECTLY correlate this condition.
(i) This is an exaggerated response of the immune system.
(ii) Symptoms are watery eyes and a running nose.
(iii) Due to the release of chemicals like adrenaline, steroids, and histamine.
(iv) Antibodies produced to these are IgE type.

• A. i, ii, iii, iv are true
• B. i, iii, iv are true
• C. i, ii, iv are true
• D. All are correct except iv

Answer 1

Answer: (C)

The condition which develops after entering this new place is known as allergy or hypersensitivity. There might be certain substances like pollen, dust, etc. present in this place to which the immune system is allergic or hypersensitive to. The immune system thus responds to this antigen in a highly exaggerated manner. The symptoms include watery eyes, runny nose, sneezing, itching, etc. The antibodies which are produced in this response are of the IgE type.
The chemicals which are released in an allergic response include histamine and serotonin which are released by the mast cells. Adrenaline has no role to play in an allergic reaction. It is a hormone produced by the adrenal medulla in situations of emergency and result into increased heart rate, etc. vasodilation, etc.