What Would Happen If You Didn’t Sleep?
Video lesson + interactive tasks about sleep deprivation, why sleep is essential, and what happens to the brain and body without it.
Stage 1
GLOSSARY
Before watching, review the words that will help you understand the video.
- sleep deprivation — the condition of not getting enough sleep
- non-REM sleep — a stage of sleep when breathing and heart rate slow down and the body restores itself
- adenosine — a chemical that builds up in the brain and increases the urge to sleep
- melatonin — a hormone that helps regulate sleep
- sleep pressure — the growing biological need to sleep
- glymphatic system — the brain’s clean-up system that removes waste during sleep
- cerebrospinal fluid — the fluid around the brain and spinal cord that helps wash away waste
- DNA repair — the process of fixing damage in DNA
- inflammation — a physical reaction in the body that can cause pain or swelling
- Fatal Familial Insomnia — a rare inherited condition that prevents normal sleep
Stage 2
PREDICTION
Using the new words, choose the most likely topic of the video.
1) What will the video most likely explain?
Stage 3
FIRST WATCH — Listening for Gist
Watch the video once. Do not pause the video. Focus on the general idea.
1) Choose the best summary of the video.
Stage 4
SECOND WATCH — Listening for Details
Watch the video again. Focus on details. You may pause if necessary.
True / False
1) Randy Gardner stayed awake for 264 hours during the experiment.
2) On the second day without sleep, Gardner’s eyes became sharper and more focused.
3) Sleep deprivation can affect learning, memory, mood, and reaction time.
4) Adults usually need only four to five hours of sleep a night.
5) The glymphatic system is more active during sleep and helps clear waste from the brain.
Multiple Choice
1) Why do we start to feel sleepy?
2) What does caffeine do in the brain?
3) What happens during non-REM sleep?
4) What is Fatal Familial Insomnia?
5) Why can long-term sleep loss cause serious problems?
Stage 5
VOCABULARY PRACTICE
Task 1
Match the word and the picture
Tap a word, then tap an image. Listen and pronounce.
Task 2
Match the word and the definition
Tap a word, then tap the correct definition. Wrong answers won’t be placed.
Task 3
Fill in the gaps
Tap a word, then tap a gap. Wrong answers won’t be placed. Tap a filled gap to clear it.
Stage 6
FINAL VOCABULARY TEST (Score)
Complete the final test. Click Submit & Score.