Understanding Circadian Rhythms

What is the origin of the word 'circadian'?

• It is a combination of English words meaning 'circle' and 'daily'.

• It originates from French words meaning 'circle' and 'day'.

• It is derived from Latin words meaning 'about' and 'day'.

• It comes from Greek words meaning 'time' and 'cycle'.

Which part of the human body is primarily responsible for controlling circadian rhythms?

• The heart

• The liver

• The stomach

• The brain

How does bright light affect melatonin production in humans?

• It has no effect on melatonin production.

• It converts melatonin into another hormone.

• It decreases melatonin production.

• It increases melatonin production.

What happens to melatonin production when the sun sets?

• Melatonin production remains constant.

• Melatonin production decreases.

• Melatonin production stops completely.

• Melatonin production increases.

What is the effect of morning light on the human body according to circadian rhythms?

• It signals the body to produce more melatonin.

• It causes the body to produce more adrenaline.

• It signals the body to stop melatonin production.

• It has no effect on the body's internal clock.