Increasing blood carbon dioxide levels decreases breathing rate?

Answer 1

Carbon dioxide levels regulate breathing via the chemoreceptors in your brain, carotid arteries, and aorta. As Carbon dioxide levels go up, the pH of the cerbrospinal fluid goes down (becomes acidic) and triggers a reaction by the chemoreceptors in your brain to cause you to breath. Specifically, those receptors are located in the floor of the fourth ventricle (in your brain stem for all intents and purposes). Expelling CO2 by breathing brings your cerebrospinal fluid's pH back down to acceptable levels. The chemoreceptors in your carotid arteries and aorta respond to the partial pressures of CO2 as well as the partial pressure of oxygen. Basically, it also tells you to breath when your CO2 levels get too high. Ultimately, it looks like when you hold your breath and "run out of air", you don't actually run out of oxygen, but you accumulate too much CO2 (after all, we can make ATP without oxygen, it just makes nasty byproducts *muscles -> lactic acid* but if our pH gets too high, we don't have a real good contingency plan for fixing it quickly)

Answer 2

The concentration of blood carbon dioxide regulates a person's breathing because blood pH operates within a very narrow range and a very small change can lead to death. If a person's concentration of blood carbon dioxide is high his/her blood is more acidic, and if a person's concentration of blood carbon dioxide is low his/her blood is more basic. When there is a build-up or deficiency of carbon dioxide in the blood stream, messages to the brain will force a person to respire.

This is why people breath heavier when exercising. Exercising increases the rate of cellular respiration by the muscles, resulting in an increase in the amount of carbon dioxide in the blood, which requires heavy breathing in order to decrease and be exchanged with oxygen.

Answer 3

gas exchange occurs in the alveoli in the lungs ... every cell needs 02 a general rule is air goes in and out aka(co2 u have to blow off-or out) and blood goes round and round .. 500ml is our tidal volume u need good gas exchange to keep the blood oxygenated

The important principle to remember is that oxygen is needed by the cell and that carbon dioxide is produced as a waste product of the cell. Carbon dioxide must be expelled from the cells and the body.

The lungs serve to exchange the two gases in the blood. Oxygen enters the blood from the lungs and carbon dioxide is expelled out of the blood into the lungs. The blood serves to transport both gases. Oxygen is carried to the cells. Carbon dioxide is carried away from the cells.

Answer 4

yes it does