The blood changes from low CO2 to high CO2 in the tissues where oxygen is delivered and CO2 is produced as a byproduct of cellular metabolism.
Same blood as everywhere else. The difference is the gases in the blood: it enters the lungs low on oxygen and high in CO2, it leaves high in oxygen and low in CO2.
High CO2 in the blood is corrected by increasing the rate of respiration. By breathing more you take in more oxygen and let out more CO2. High CO2 in the atmosphere is corrected by photosynthesis which uses light and CO2 as energy and releases oxygen as a product.
Breathing rapidly (hyperventilation) or slowly (hyperventilation) are ways the body may become unbalanced or attempt to compensate an imbalanced blood pH. The blood's normal pH is 7.35-7.45. Carbon dioxide (CO2) is acts to acidify the blood (lower the pH). Therefore, hyperventilating (deceasing the CO2 contained in the blood) increases blood pH. Inversely, hypoventilation creates a decline in blood pH.
CO2 in the body is transported in the blood to the lungs, where it is exhaled out of the body during respiration. A build-up of CO2 can lead to respiratory acidosis, a condition that can affect the body's pH balance.
They diffuse through the membrane.Diffusion is the movement of gaseous particles from a high concentration of particles, to a low concentration.Using your example of CO2, there is a high ammount of CO2 in de-oxygenated blood, so it travels to the alveoli through the membranes, where there is a lower concentration of CO2.Remember, near every alveoli there is a capillary, which makes this possible.
The brain detects high CO2 levels in the blood through specialized chemoreceptors called central chemoreceptors, located in the medulla oblongata. These receptors are sensitive to changes in the pH of the cerebrospinal fluid caused by high levels of CO2, triggering an increase in ventilation to remove excess CO2 from the body.
The CO2 in blood is considered acidic.
this better to say blood with high CO2 concentration is dark and blood with high CO (Carbon monoxide toxemia) is bright, so O2 saturated blood is just NORMAL.
at a co2 of 100 or so the person will be confused and sleepy. The lungs taking in the oxygen are not exhaling forcefully enough to expel the co2. This is usually due to lung problems such as COPD
O2 sat on room air or arterial blood would be lower than normal. CO2 levels would be higher.
Physically dissolved CO2 accounts for the least amount of CO2 transported in blood. The majority of CO2 is carried in the blood as bicarbonate ions and carbaminohemoglobin.