Adrenaline causes a reduction in blood flow to the digestive system and skin due to muscle contractions around small arteries, diverting blood to skeletal muscles. Additionally, the breathing rate increases due to contractions of the diaphragm and rib muscles.
What physiological changes occur in response to the secretion of adrenaline, specifically in terms of blood flow to different organs and the respiratory system?
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In response to adrenaline secretion, blood flow is redirected to organs crucial for immediate action. Adrenaline induces vasodilation in skeletal muscles, enhancing blood supply, while constricting vessels in non-essential areas like the digestive system. This prioritizes oxygen and nutrient delivery to muscles for physical exertion. Simultaneously, the respiratory system responds with bronchodilation, increasing airway diameter for improved oxygen intake. Adrenaline also stimulates an elevated heart rate, boosting cardiac output. These physiological changes optimize the body for a “fight or flight” response, ensuring enhanced oxygenation, nutrient supply, and cardiovascular support to meet the demands of heightened activity.