Anaphylaxis
allergen
Anaphylaxis or Anaphylactic shock, typically.
Endothermic reaction is a term that describes a reaction in which heat is part of the reactants. This means that the reaction absorbs heat from its surroundings to proceed.
A common reaction associated with severe short-term stress is the body's "fight or flight" response. This can manifest as increased heart rate, shallow breathing, sweating, and heightened alertness to respond quickly to the perceived threat.
A Yeast Infection
anode
Anxiety
Anxiety
mccarthyism
Anxiety
depression
The term you are looking for is "reaction" or "response." It describes the action taken as a result of a stimulus or influence.