respitory breathing

Question 1

What are the major functions of the respiratory system, and what four distinct events make up respiration?

Answer 1

The major function of the respiratory system is to supply the body with oxygen and to dispose of carbon dioxide. To do this, at least four distinct events, collectively called respiration, must occur:

Question 2

step 1What is pulmonary ventilation?

Answer 2

Pulmonary ventilation is the process of moving air in and out of the lungs (breathing) to refresh the gases in the alveoli.

Question 3

step 2 What happens during external respiration?

Answer 3

Gas exchange between the pulmonary blood and alveoli occurs, where oxygen is loaded into the blood and carbon dioxide is unloaded from the blood.

Question 4

step 3 What is the role of respiratory gas transport?

Answer 4

Respiratory gas transport involves the movement of oxygen and carbon dioxide via the bloodstream to and from the lungs and body tissues.

Question 5

step 4What is internal respiration?

Answer 5

Internal respiration happens in the tissues: Blood delivers oxygen to cells and collects CO₂ to bring back to the lungs.

Question 6

step 5Which processes are the responsibility of the respiratory system?

Answer 6

: Pulmonary ventilation and external respiration are the special responsibility of the respiratory system.

Question 7

step 6 Why are all four processes necessary for gas exchange?

Answer 7

All four processes—pulmonary ventilation, external respiration, respiratory gas transport, and internal respiration—work together to ensure oxygen reaches tissues and carbon dioxide is removed from the body.

Question 8

step 7 What is cellular respiration?

Answer 8

Cellular respiration is the use of oxygen to produce ATP (energy) and carbon dioxide as a byproduct, which occurs in nearly all cells.