1 Oxygen: Specialized nerve cells within the aorta and carotid arteries called peripheral chemoreceptors monitor the oxygen concentration of the blood and feed back on the respiratory centers. 2  If the oxygen concentration in the blood decreases, they tell the respiratory centers to increase the rate and depth of breathing. This mechanism prevents damage to the lungs that would be caused by over-inflation. 2  Signals from higher brain centers: Nerve cells in the hypothalamus and cortex also influence the activity of the respiratory centers. 3  During pain or strong emotions, the hypothalamus will tell the respiratory centers to speed up.
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Why Early Delivery May Be Dangerous. A babyâs important organs, like the brain and lungs, are still developing in weeks 37 and 38. Babies born earlier than 39 weeks are more likely to have medical conditions that require time in the intensive care unit. A baby delivered early may have: 1  Breathing problems because his lungs are not fully developed.