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Exercise Leads to decreased oxygen and increased CO2 in the working muscles

Exercise Leads to decreased oxygen and increased CO2 in the working muscles. Leads to increased CO2 in the blood vessels supplying the working muscles. Exercise excites the brain!. Lowers the pH of the blood (acidosis). CO2 is an acid!. The brain sends a message to the adrenal glands.

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Exercise Leads to decreased oxygen and increased CO2 in the working muscles

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  1. Exercise Leads to decreased oxygen and increased CO2 in the working muscles Leads to increased CO2 in the blood vessels supplying the working muscles Exercise excites the brain! Lowers the pH of the blood (acidosis). CO2 is an acid! The brain sends a message to the adrenal glands Sensed by nerve receptors (chemoreceptore) in the Aortic arch and Carotid artery Adrenal glands release epinephrine (adrenaline). Message sent to the Medulla Oblongata (lower brain stem) Epinephrine increases heart rate , dilates pupils, constrictsarterioles in skin/gut and dilates skeletal muscle arterioles and airway passages Brains stem signals diaphragm and other breathing muscles to contract at a faster rate. More air (and hence oxygen))breathed in Blood flows more quickly to working mucles Amount of CO2 exhaled increases and blood CO2 levels drop Raises the pH of the blood. And (lucky coincidence) Oxygen levels in working muscles comes back up.

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