<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>
Pain in two or more joints.
Raynaud's phenomenon.
Skin changes.
Swollen hands.
<span><span>Muscle weakness.</span>
</span>
Answer:
A.
Explanation:
I've had to answer this before
Answer:
Bones are hard, Inelastic and a tough organ that firms part of the vertebral skeleton.
Cart alive is soft, elastic, and flexible connective tissue that protects bone from rubbing against each other.
