Question

select all that apply
which are three functions of the respiratory system? more than one answer may be correct.
transport gases from lungs to body cells
production of co₂ at the cellular level
remove co₂ from the body
participate in gathering olfactory information
regulate blood ph

Explanation:

• Transporting gases from lungs to body cells is not a function of the respiratory system. The circulatory system is mainly responsible for this.
• Production of \(CO_2\) at the cellular level is a result of cellular respiration (a metabolic process in cells), not a function of the respiratory system.
• The respiratory system removes \(CO_2\) from the body. When we exhale, \(CO_2\) is expelled.
• The nose (part of the respiratory system) participates in gathering olfactory information (sense of smell).
• The respiratory system helps regulate blood pH. By controlling the amount of \(CO_2\) exhaled (since \(CO_2\) can form carbonic acid in the blood and affect pH), it can influence blood pH.

Answer:

• C. remove \(CO_2\) from the body
• D. participate in gathering olfactory information
• E. regulate blood pH