Answer:
The IgE antibodies bind to mast cells. The allergen cross-links them. This triggers the mast cells to release powerful chemicals like histamines. Histamines cause the allergic symptoms like itching and runny nose. If you are allergic to pollen, your body will produce a large amount of allergen-specific IgE antibodies when you come in contact with pollen. The IgE antibodies bind to mast cells. The allergen cross-links them. This triggers the mast cells to release powerful chemicals like histamines.
The layer that encloses and protects the heart is
Pericardium
From experience with my best friend, I´d say C.
Salutations!
What is the easiest way to recognize foods contaminated with spoilage bacteria?
The easiest way to recognize foods contaminated with spoilage bacteria is when you observe the color change and smell. When the color has got very unprepossessing, and the smell is a bit awful. A bit greenish, blackish on the bread, its straight away a contaminated food with spoilage bacteria leading you to illness.
Hope I helped (:
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