Final answer:
The reaction not typically part of the body's immediate response to stress is the increase in higher-order thinking for problem solving, as immediate stress responses focus on physiological survival mechanisms, not cognitive processing.
Step-by-step explanation:
The reaction that is NOT a typical part of the body's immediate response to stress is "Higher-order thinking is increased in order to find a solution to the problem." This is not typical because the immediate response to stress is primarily characterized by physiological changes geared towards survival, rather than cognitive problem-solving.
When we experience stress, the sympathetic nervous system and the hypothalamic-pituitary-adrenal (HPA) axis become activated. These responses include the release of adrenaline and cortisol, which accelerate the heart rate and respiration, as well as suppress the immune system to a certain extent. The fight-or-flight response modulates various systems including the cardiovascular and immune systems, inhibiting functions considered non-essential in the face of immediate danger, such as higher cognitive functions.
In contrast, after the initial response, if the stressor persists, there may be a transition to higher-order thinking as the brain assesses and strategizes ways to deal with the stress, but this is not part of the immediate response.