4:52 774 d2l.laurentian.ca Quiz 3 0:04:21 elapsed In the control of respiration by the regulatory centers of the brain, what stimulates activity in the dorsal respiratory group? a) output from the apneustic centre b) any inhibition of the respiratory centre c) activation of the pneumotaxic centre d) both a) and b) e) both a) and c) 3

The dorsal respiratory group (DRG) is primarily stimulated by inputs from peripheral chemoreceptors and mechanoreceptors that detect changes in oxygen, carbon dioxide, and pH levels in the blood. These inputs are crucial for maintaining homeostasis and ensuring that the body gets the right amount of oxygen while expelling carbon dioxide effectively. In the context of brain function, the DRG plays a key role in automatic, rhythmic breathing. For instance, when you engage in physical activity such as running, signals sent from muscle receptors alert the DRG to increase your respiratory rate. This ensures that your body receives enough oxygen to meet heightened metabolic demands while also fostering an interesting interplay of signals that keep our breathing in sync with our activities!