Systemic (body-wide) acute allergic response caused by allergens that directly enter the blood, as with certain bee stings or spider bites, is called ________.

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Anaphylactic shock is a systemic acute allergic response caused by allergens entering directly into the blood, and can be life-threatening if left untreated. Myasthenia gravis and rheumatic fever are not related to acute allergic responses, and delayed hypersensitivity is a different type of immune response that occurs over a longer period of time.

Systemic (Body-Wide) Acute Allergic Response Caused by Allergens That Directly