Stage 2: Resistance- During this 'adaptive' stage, the PNS reduces heart and respiration rates, blood-glucose levels and some stress-related hormones such as adrenalin and cortisol continue to circulate the body, keeps the body prepared for action and increase the person's stress tolerance. If the stress continues, the person remains in an elevated state of arousal with greater energy resources at their disposal to deal with the situation and adapt physiologically to the higher levels of stress. During this stage, more susceptable to colds, flu or other bacterial infections due to the continued circulation of nor/adrenaline and cortisol - cortisol can suppress the immune system.