The fight-or-flight response in humans prepares the body to fight off or run away from

a potential threat. This response results from a series of nerve and chemical signals that

direct how cells function. This, in turn, determines the actions of organs in these situations.

Some of the changes experienced by the individuals as part of this response include:

increased pulse rate

increased blood glucose levels

increased breathing rate


Select one of the listed changes experienced by the individual and write it on the line below.

Explain how the change you chose allows the individual to effectively respond to a threat.