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Because dry seeds have a very low metabolic rate and do not produce much Co2. Germinating seeds produce more Co2.
Volcanism -- volcanoes -- are the greatest source of atmospheric CO2. After this, in varying degrees, are animal respiration, human energy generation, and transportation.
As the body's metabolic rate decreases, the amount of CO2 that is released into the blood stream decreases as well. The reduced amount of free CO2 means that there is less interaction with H20 which in turn reduces the amount of carbonic acid in the blood stream. With less carbonic acid, there is less neutralization, then there is less free hydrogen ions in the blood stream.
It depends on a number of factors such as age, heart rate and depth of breathing. However, on average a human being exhales around 40,000 PPM of CO2.
Human cells use oxygen and produce carbon dioxide, CO2, and water, H2O, in their metabolic reactions, whereas plants do the opposite in photosynthesis, in which 6 CO2 combine with 6 H2O to form 1 glucose and 6 O2.
Plants use CO2 in photosynthesis. They convert CO2 and H2O into carbohydrates through a series of metabolic pathways.
Cellular respiration produces CO2 and water as by-products of the metabolic pathway.
There are a range of different waste products including CO2 and urea. The majority of these are removed in the urine by the kidneys however CO2 is removed in form the blood in the lungs.
If there is metabolic alkalosis (high pH in the blood) or metabolic acidosis (low pH in the blood), the respiratory system will compensate by either increasing or decreasing the rate of respiration (expulsion or retention of CO2 to bring the blood pH back to within normal limits).
Cellular respiration produces CO2 and water as by-products of the metabolic pathway.
Cellular respiration produces CO2 and water as by-products of the metabolic pathway.