Sleep is responsible for restoring energy, strengthening immune function, balancing mood, and storing learning and memory for future recall. Yet, it is likely that sleep does not rank as high as other daily tasks. Ironically, sleep reaches the forefront of concern when you are unable to stay awake, fall asleep, or stay asleep. Besides leaving you to operate in slow motion, lack of sleep might also affect wellness. Regarding the role of sleep in maintaining wellness, consider the influences sleep disorders such as sleep apnea, insomnia, and narcolepsy might have on immune function.