The pain associated with pulpitis often
disappears when a patient visits a dental
office. This occurs due to which of the
following events?

Pulpal pain receptors undergo
fatigue

Stress-induced sympathetic activity
causes vasodilatation of pulpal blood
vessels

Stress-induced sympathetic activity
inhibits pulpal sensory fibres that
cause pain

Local mediators of pulpal pain are
not released when a stress-induced
rise in blood pressure occurs