Circadian Rhythms

The rhythms in ecosystems that last 24 hours and that are related with an internal clock.

• circadian rhythms

• seasonal rhythms

What does darkness signal the production of?

• Serotonin

• Melatonin

• Dopamine

• Adrenaline

What is the role of bright light in the morning?

• Promotes wakefulness

• Induces sleep

• Reduces hunger

• Increases fatigue

How can darkness affect sleep?

• It decreases melatonin production.

• It signals melatonin production.

• It has no effect.

• It increases energy levels.

Why do people use special lamps in winter?

• To mimic daylight

• To heat their homes

• To reduce electricity bills

• To improve air quality

A circadian rhythm is: ______

• Body language

• Cycle that occurs on a regular basis

• Musical rhythms

• Visual communication

What is the primary function of circadian rhythms in humans?

• Regulate sleep-wake cycles

• Control digestion

• Manage blood pressure

• Enhance memory

Tags

NGSS.HS-LS1-3

Which hormone is most closely associated with the regulation of circadian rhythms?

• Cortisol

• Melatonin

• Insulin

• Adrenaline

What external factor is most influential in synchronizing circadian rhythms?

• Temperature

• Light

• Sound

• Humidity

In which part of the brain is the master clock that controls circadian rhythms located?

• Cerebellum

• Hippocampus

• Suprachiasmatic nucleus

• Amygdala