As the sun comes up in the morning your blood level of what goes down and you wake up.
Correct answer: A. Melatonin
- A. Melatonin
- B. Cortisol
- C. Glucagon
- D. Adrenalin
Explanation
As sunlight increases, melatonin production decreases, signaling wakefulness. This decrease in melatonin levels corresponds with the body's natural circadian rhythm, prompting arousal and readiness for the day.
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About Coordination and Control
Coordination depends on receptors, neurons, synapses and nerve impulses, with reflex actions traced through the reflex arc and the roles of major brain regions. Chemical coordination covers endocrine glands and hormones, including how hormones regulate growth, metabolism, reproduction and internal balance, unlike rapid nervous control.
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