Understanding the Stages and Value of Sleep

The video explains the importance of sleep for the body and brain, highlighting its role in rest and problem-solving. It describes the different stages of sleep, from light drowsiness to deep REM sleep, detailing the physiological changes and characteristics of each stage. The video emphasizes the significance of REM sleep for dreaming and memory retention.

Why is sleep considered a natural survival instinct?

• It helps in digesting food faster.

• It allows the body and brain to rest and recover.

• It helps the body to grow taller.

• It makes people more intelligent.

During which stage of sleep does the body start feeling drowsy?

• Stage two

• Stage one

• Stage three

• REM stage

What happens to the body during stage two of sleep?

• The muscles tense up.

• The body becomes more sensitive to temperature.

• The brain becomes more active.

• Heartbeat and breathing slow down.

Which stage of sleep is associated with sleepwalking and talking?

• Stage one

• Stage two

• Stage three

• REM stage

What is a characteristic of the REM stage of sleep?

• The body is very tense.

• Breathing becomes regular.

• Dreaming occurs.

• The heart beats slower.