Question

A person may die due to allergic reaction or an anaphylactic shock which is characterized by

• A. constriction of peripheral blood vessel
• B. blood capillaries become highly permeable causing loss of fluid from the blood
• C. drastic increase in the blood pressure
• D. all of the above

Answer 1

Answer: (B)

blood capillaries become highly permeable causing loss of fluid from the blood

Anaphylaxis is a severe allergic reaction that occurs rapidly and causes a life-threatening response involving the whole body. This reaction can lead to difficulty breathing and shock ultimately leading to death. Histamine dilates blood vessels and makes them more permeable so that they lose fluid causing swelling in the tissues.

So, the correct option is "blood capillaries become highly permeable causing loss of fluid from the blood".