<span>Hay fever is a manifestation of allergic reaction
from pollen, which is prevalent during haying season. Hay fever is commonly
known as allergic rhinitis caused by an oversensitive immune system,
particularly the lymphocytes, leading to a misdirected immune response. The body
undergo a sensitization when one develops IgE antibodies and develop a strong
TH2 response against pollen. Then, this newly develop IgE antibodies sticks to
basophils and mast cells with no signs and symptoms yet. However, when one is
expose again to pollens, mast cells will be activated and release mediators who
are responsible for immediate vascular and smooth muscle reaction. After this, local
clinical manifestation of hay fever will be observed. </span>
In the air it's like nitrogen carbon I forget the other 2
the third Choice is the answer i think.
Answer:
a. scientific journal articles and presentations at conferences
Explanation:
right answer on edg.
C.Stimulation of thoracic or lumbar spinal regions,chain ganglion,acetylcholine release
