Which of the following promotes the release of melatonin at bedtime?i.  Lights outii.  Lying downiii.  Closing eyesiv.  Winding down

Which of the following is TRUE of melatonin? (There may be more than one answer. Please select all correct answers.)Group of answer choicesMelatonin is produced in response to darknessMelatonin is secreted by the pineal gland in the brainMelatonin helps to prepare the body for sleepLight exposure suppresses the production of melatonin

Which of the following would stimulate the secretion of melatonin from the pineal gland?Multiple ChoiceDarknessHigh blood glucoseLight raysHypothermia

What do you do each night before closing your eyes? Do you use your phone to send messages, play games or even watch movies? You’re not alone. But did you know that the light from your screen can interfere with your sleep? If you are one of the millions of teenagers worldwide who are not getting a good night’s sleep, you may want to consider turning off your phone an hour before bed.Before the arrival of artificial lighting, we began and ended our day at the command of the sun. As sunlight diminishes, our bodies naturally produce a chemical called melatonin which helps to bring on sleep. But with artificial light, our brains can be fooled into thinking that night-time is actually daytime. The light from a phone’s screen is more problematic than other forms of artificial light because it has a higher concentration of blue light, the colour of light from the visible spectrum that most impedes melatonin production. This means that looking at a screen late at night can play havoc with your natural sleeping pattern, affecting the quality of your sleep, and making you feel tired in the morning even if you slept for a long time. Some phones have a special night-reading mode where white text is displayed on a black background. This helps to reduce the amount of blue light entering your eyes, but if you’re looking at the screen for a couple of hours, the purpose is defeated.Of course, screen time is not the only factor that affects your ability to sleep. For example, eating high-protein foods before bed can also affect how well you sleep. However, given that sleep is so important to your health, it may be time to evaluate your own mobile phone habits.Question promptWhy is blue light a problem at night?

The Sleep Foundation reports that exposure to blue light leading up to bedtime can hinder sleep. This is because: Group of answer choicesAll of the above are correctBlue light reduces the body temperatureBlue light may suppress the body's secretion of melatoninBlue light reduces heart rate

What is the function of melatonin?Multiple Choiceregulate blood glucose levelsregulate blood calcium levelsaid in the differentiation of T lymphocytescontrol the daily sleep-wake cyclecontrol the color of the skin