What physical response is triggered by laughter that contributes to stress relief?

Laughter is known to promote stress relief primarily through the release of endorphins, which are the body’s natural feel-good chemicals. When we laugh, our brain responds by triggering the hypothalamus to release endorphins into the bloodstream. This increase in endorphins can lead to significant improvements in mood and a reduction in feelings of stress and anxiety.

In addition to regulating emotions, endorphins also have a role in pain relief, which can further contribute to an overall sense of well-being. This makes laughter not just a momentary distraction, but a physiological mechanism that promotes relaxation and a reduction in stress levels in a more enduring manner.

The other options suggest different physiological responses that are not directly associated with the stress-relieving effects of laughter. Increased heart rate can occur during laughter but is not the primary contributor to stress relief. Heightened muscle tension does not promote relaxation, and cortisol production is linked to stress rather than relief.