Science & Technology

Do You Know How Caffeine Affects Sleep? Find Out Here!

How many hours of sleep do adults need?

5-6 hours

7-9 hours

10-12 hours

6-8 hours

Adults generally need 7-9 hours of sleep per night to maintain optimal health and cognitive function.

Which stage of sleep is the deepest?


Light sleep

Stage 2

Stage 3

Stage 3 sleep, also known as slow-wave sleep, is the deepest stage of non-REM sleep, crucial for physical restoration.

What hormone regulates sleep-wake cycles?





Melatonin is the hormone responsible for regulating sleep-wake cycles, signaling to the body when it’s time to sleep.

What percentage of our lives is spent sleeping?





On average, humans spend about one-third (33%) of their lives sleeping.

Which sleep disorder involves difficulty falling asleep?

Sleep apnea



Restless legs

Insomnia is a sleep disorder characterized by difficulty falling or staying asleep.

What is the ideal nap length?

10 minutes

20 minutes

45 minutes

60 minutes

A 20-minute nap is considered ideal as it provides rest without entering deep sleep, preventing grogginess.

How often does the sleep cycle repeat?

30 minutes

60 minutes

90 minutes

120 minutes

The sleep cycle, consisting of various stages, typically repeats every 90 minutes.

What term describes sleepwalking?


Sleep apnea


REM behavior disorder

Somnambulism is the medical term for sleepwalking, a condition where a person walks or performs other activities while not fully awake.

What is the most common sleep disorder?

Sleep apnea



Restless legs

Insomnia is the most common sleep disorder, affecting a significant portion of the population with symptoms of difficulty sleeping.

Which device measures sleep patterns?





An actigraph is a device worn on the wrist that monitors sleep patterns and movements during sleep.

What is the primary function of REM sleep?


Muscle repair

Digesting food


REM sleep is primarily associated with dreaming and is crucial for emotional regulation and memory consolidation.

Which sleep phase comes directly after REM sleep?

Stage 1

Stage 2

Stage 3


After a REM sleep phase, the sleep cycle typically begins again with Stage 1 sleep.

What is a common cause of sleep apnea?


High blood pressure


Low sugar levels

Obesity is a common cause of obstructive sleep apnea due to excess weight putting pressure on the airway.

How does caffeine affect sleep?

Promotes sleep

Delays sleep onset

Enhances deep sleep

Shortens REM sleep

Caffeine delays sleep onset by blocking adenosine receptors, which promote sleepiness.

What term describes the body’s internal clock?

Circadian rhythm


REM cycle

Sleep spindle

The circadian rhythm is the body’s internal clock that regulates the sleep-wake cycle over a 24-hour period.

What is the average duration of REM sleep per night?

10 minutes

90 minutes

3 hours

5 hours

On average, REM sleep constitutes about 20-25% of total sleep time, roughly 90 minutes.

What is the purpose of sleep spindles?

Muscle relaxation

Memory consolidation

Dream formation

Appetite regulation

Sleep spindles are bursts of brain activity during non-REM sleep that are important for memory consolidation.

Which neurotransmitter promotes wakefulness?





Orexin (or hypocretin) is a neurotransmitter that promotes wakefulness and regulates arousal.

What lifestyle factor can disrupt sleep patterns?

Regular exercise

Balanced diet

Excessive screen time

Reading books

Excessive screen time, especially before bed, can disrupt sleep patterns due to blue light affecting melatonin production.

Which type of sleep is most restorative?

REM sleep

Stage 1

Stage 2

Stage 3

Stage 3, or deep sleep, is the most restorative type of sleep, crucial for physical and mental recovery.

Sleepless Wanderer

Your sleep knowledge could use some waking up!

Sleep Savvy

You know a fair amount about sleep, keep dreaming big!

Sleep Guru

You’re a true expert on sleep, even the Sandman would be impressed!

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