Please choose the correct ending to complete the given sentence: Health: [header] How to know if you're sleep deprived [title] Be aware of decreased cognitive function. [step] It's no surprise that a lack of sleep can cause irritability and changes in mood. You may actually develop a mood disorder if you're consistently sleep deprived.

Ending1: Disruptions in the sleep cycle have been strongly connected to depression and a reduced quality of life. [substeps] You may also feel more anxious and lose your motivation to do simple everyday tasks. Ending2: [substeps] Don't be surprised, however, that you may not still be irritable after a long day. Another sign of possible sleep-related issues is the cognitive function (dyslexia), which is a sign that cognitive functioning is the result of a weakened receptor in your brain. Ending3: If you experience major depressive symptoms that coincide with your sleep cycle, don't ignore them. [substeps] Some people experience feelings of sleepiness or sadness even after poor sleep. Ending4: [substeps] You may begin feeling refreshed if a new setting or a new person seems to affect you physically or emotionally. Your physical appearance may change as you gain new skills or become more active.

Answer format: ending1/ending2/ending3/ending4