Final answer:
Physiological stress responses can be modulated by factors such as hormones and neurotransmitters.
Step-by-step explanation:
Physiological stress responses can be modulated by various factors. These factors can include hormones, neurotransmitters, and the immune system. For example, the release of stress hormones such as cortisol can help regulate the physiological response to stress. Additionally, neurotransmitters like norepinephrine can influence heart rate and other physiological processes.