A true food allergy involves the _____ system
a. immune
b. digestive
c. respiratory
d. cardiovascular
A
In a true food allergy, the immune system reacts to a substance in food as if it needed to protect the body from a foreign substance. Food allergies may cause reactions in the digestive or respi-ratory systems, but these are secondary effects, not primary responses. The cardiovascular system is not usually involved in food allergy.
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