Final answer:
In the humoral response, two events take place when arming loads the gun: antigen recognition and antibody production.
Step-by-step explanation:
The two events that take place when arming loads the gun in the humoral response are antigen recognition and antibody production.
When an invading pathogen is detected, B cells recognize the specific antigens on the surface of the pathogen. This recognition triggers the production and release of antibodies by the B cells.
The antibodies produced in the humoral response bind to the antigens on the pathogen, leading to their destruction and elimination from the body.