Anaphylactic shock is a form of distributive shock where the blood vessels _______________?

Due to the chemical release from the immune system, bronchioles constrict causing blood vessels to dilate and dropping the blood pressure.  Capillaries become permeable and leak a little causing hives to form on the skin. Distributive shock is difficult to recognize in the field, heart rate remains relatively low, skin is flushed due to the dilatation of the blood vessels.