Although respiratory muscles are voluntary, you cannot hold your breath until you lose consciousness because your brain will force you to ventilate (= breathe) before then. Explain how the brain ‘knows’ when to stimulate ventilation.

Hello, May I get help on this question very soon please? I do not understand it. Question: You're talking to one of your grandparents on the phone, and they are telling you about some really neat things they just learned about the lungs on a documentary. Specifically, they are telling you about this really cool feedback loop where lower in CO2 in the blood in near skeletal muscles than usual to leads your brain to trigger a whole bunch of responses in how you breathe. They mention about how your medulla tells your systemic arterioles to constrict, for your external intercostals to contract less, and your lung muscles to contract less. You tell them how much you love to hear that they are learning about the respiratory system, but you gently note that the documentary must have got one thing wrong. The documentary was incorrect because (see image)

1) During alveolar HYPERventilation, levels of blood CO2 drop while blood O2 is elevated. What reflexive responses will this stimulate from the CPG?   a) Increased DRG and VRG activity in the medulla, stimulating I and E motor neurons.   b) Decreased DRG and VRG activity in the medulla, stimulating I and E motor neurons.   c) Decreased DRG and VRG activity in the medulla, inhibiting I and E motor neurons.   d) Increased DRG and VRG activity in the medulla, inhibiting I and E motor neurons.

Consider the following situations: A person who is drinking water from a water bottle chokes and starts coughing vigorously A person driving on a highly polluted highway starts to feel an irritation in the nose and sneezes A person yawns while working at his desk What is common among these conditions? How would you relate these conditions to the respiratory system?