Final answer:
During a stress response, the body undergoes various physiological changes such as increased heart rate and blood pressure, dilated pupils, and a slow down in the digestive system as part of the "fight-or-flight" response, all mediated by stress hormones like epinephrine and norepinephrine.
Step-by-step explanation:
Changes in the Body During Stress Response
During a stress response, several physiological changes occur in the body as part of the "fight-or-flight" response. These include:
- Increased heart rate: To pump more blood to the muscles and vital organs.
- Increased blood pressure: To deliver more oxygen and nutrients to tissues during heightened activity.
- Dilated pupils: To allow more light into the eyes, which can improve vision.
- Negative impact on the digestive system: Digestion may slow down or stop as the body diverts energy to more critical functions for immediate survival.
These changes are mediated by the release of hormones such as epinephrine and norepinephrine, which also increase breathing rate, muscle contractions, and blood glucose levels.