Alveoli are found in lungs and exchamge O2 and Co2 !!
so answer is last one !!
During normal breathing, the brain is stimulated to breath with increasing acidity as a result of CO2 concentration from basic metabolic processes. The brain is quite selfish and only really wants to maintain it's pH which should be at a range of 7.3-7.45, and will not tolerate any decrease.
In patients who have a chronic respiratory disorder with things like COPD. The brain has become accustomed to excessive acidic content, and is now stimulated by the Hypoxic drive or by low oxygen content.
Answer:
am not sure of the answer
Answer:
True.
Explanation:
They can be divided independently in plants.