A) Adrenaline
B) Benadryl
C) Albumin
D) Histamine
Correct Answer: D
Solution :
When a specific allergen is injected directly into the circulation, the allergen can react with basophils and mast cells. A widespread ollergic reaction occurs throughout the vascular system and closely associated tissue, the condition called anaphylasis. Histamin is released into the circulation and causes body-wide vasodilation as well as increased permeability of the capillaries with resultant marked loss of plasma from the circulation.
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