The correct answer to the question is:
- When confronted with a stressor, the body's **nervous** system responds by accelerating its functions to prepare the body for the perceived threat or stress. This is known as the fight-or-flight response, where the sympathetic nervous system is activated, leading to an increase in heart rate, breathing rate, and overall alertness.
- The **immune** system, on the other hand, does not slow down when faced with a stressor. In fact, chronic stress can suppress the immune system, making individuals more susceptible to illnesses and infections due to the release of stress hormones like cortisol, which can weaken immune responses over time.
- The **cardiovascular** system also does not slow down in response to stress. Instead, it may experience an increase in blood pressure and heart rate to supply more oxygen and nutrients to the muscles and organs needed for the fight-or-flight response.
- The **lymphatic** system is responsible for maintaining fluid balance in the body and helping with immune responses. It does not directly slow down when faced with a stressor but can be affected indirectly by the impact of stress on the immune system.
- The **circulatory** system is closely related to the cardiovascular system and does not slow down in response to stress. Instead, it works in conjunction with the heart to deliver oxygen and nutrients to tissues and remove waste products efficiently, supporting the body's response to stress.
In summary, when the body is confronted with a stressor, the nervous system speeds up, while the immune, cardiovascular, lymphatic, and circulatory systems do not slow down but may be influenced by the body's stress response in various ways.
