The Power of Sleep
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Questions and Answers

What is the purpose of sleep?

The purpose of sleep is to sort and store information in the brain, reduce stress, and maintain a healthy heart, immune system, and memory.

How many sleep stages have scientists identified?

Scientists have identified five sleep stages.

What happens during Stage 1 of sleep?

During Stage 1 of sleep, the brain tells the muscles to relax and the heart to beat slowly.

Which stage of sleep is the period of deeper sleep?

<p>Stage 2 is the period of deeper sleep.</p> Signup and view all the answers

At which stage of sleep do we sleep most soundly?

<p>Stages 3 and 4 are when we sleep most soundly.</p> Signup and view all the answers

What happens during Stages 3 and 4 of sleep?

<p>During Stages 3 and 4 of sleep, our brainwaves and heartbeat are at their slowest and our muscles become very relaxed.</p> Signup and view all the answers

What is the percentage range of a young adult's sleeping time spent in Stage 2 of sleep?

<p>Stage 2 of sleep makes up about 44% to 55% of a young adult's sleeping time.</p> Signup and view all the answers

What is the role of sleep in reducing stress?

<p>Sleep is important for reducing stress.</p> Signup and view all the answers

What is the function of sleep in keeping the heart, the immune system, and the memory healthy?

<p>Sleep plays a role in keeping the heart, the immune system, and the memory healthy.</p> Signup and view all the answers

How many sleep stages have scientists identified by studying brainwaves?

<p>Scientists have identified five sleep stages by studying brainwaves.</p> Signup and view all the answers

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