Which of the following is not a physiological response related to PTSD?

Decreased energy levels is not a physiological response directly associated with PTSD. While individuals with PTSD may experience fatigue or lethargy as a result of the mental and emotional toll of their symptoms, decreased energy levels are not inherently a physiological response like increased heart rate, increased cholesterol levels, or increased blood pressure.

PTSD often leads to heightened arousal and anxiety, which can manifest through physiological changes such as an increased heart rate and elevated blood pressure due to the body's fight-or-flight response. Additionally, the stress and anxiety associated with PTSD can contribute to changes in cholesterol levels, even though cholesterol levels are influenced by various factors, including diet and lifestyle. However, feelings of fatigue or decreased energy can result from the impact of stress on mental health rather than a direct physiological response like the others listed.