Balance in Action: How our body harmonizes circadian rhythms, biochemical pathways, and immune defense to fuel, protect, and repairāday and night. Morning Activation: ā¢ Sunlight Detection: When we wake, light enters the eyes and is detected by photoreceptors in the retina, signaling the suprachiasmatic nucleus (SCN) in the brain. This regulates our circadian rhythm by suppressing melatonin production and initiating wakefulness. ā¢ Circadian Rhythm and Hunger: This internal clock governs not only sleep but also metabolic processes. Morning signals, like cortisol release, prepare the body for activity, including stimulating hunger as a source of energy. ā¢ Nutrient Utilization: The body relies on nutrients from food to fuel cellular and systemic functions. These nutrients are processed via biochemical pathways (e.g., glycolysis, citric acid cycle) to create energy (ATP) and essential molecules for bodily functions. ā¢ Immune Activation: Upon waking, the immune system transitions into an active state to protect the body from pathogens. Nighttime Recovery: ā¢ Rest and Digest: The parasympathetic nervous system dominates, prioritizing digestion, cellular repair, and energy conservation. ā¢ Cellular Turnover and Repair: During sleep, the body breaks down damaged or worn-out cellular components and repairs tissues. Processes like autophagy (cellular cleanup) and protein synthesis are prominent.
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