A10-year-old boy has been brought to the emergency department (ed) by ambulance in apparent anaphylaxis after accidentally eating a snack bar that contained peanuts. the ed nurse should be aware that this patient's signs and symptoms are attributable to:

The right answer is A massive release of histamine.

Anaphylactic shock is an immediate, severe and generalized allergic reaction that affects the body as a whole. It requires emergency treatment.

Anaphylactic shock may occur, for example, following a bite of a hymenopteran (bee), or if the drug-sensitive individual is injected with this allergen into the blood (eg, penicillin) or if ingests a food to which he is allergic.

In anaphylactic shock, a large number of mast cells and basophilic granulocytes release histamine in different areas of the body. The outcome can be fatal.

The symptoms appear very quickly; they include demonstrations:

Cutaneous: itching, swelling;

Respiratory: bronchioles tighten, breathing is difficult;

Digestive: nausea, vomiting, abdominal pain;

Cardiovascular: tachycardia, drop in blood pressure.

* Adrenaline (vasoconstrictor) and a bronchodilator should be used to control these serious effects of histamine.

the element that provides strength to the exoskeletons of clams and oysters is phosphorus. this is so because calcium carbonate is the main component in the shells.

explanation: