17 Questions
What is the purpose of the diaphragm and muscles between your ribs in breathing?
To move air in and out of the lungs
Why do most organs sink in water but lungs float?
Because lungs are lighter due to air present in alveoli
Where does gas exchange between air and blood take place, according to the text?
In the alveoli
Which blood vessels should be colored blue on diagrams, according to the text?
Vessels that carry blood to the lungs
Why does breathed-out air have less oxygen and more carbon dioxide than breathed-in air?
Gas exchange in the lungs changes the composition of air.
What is the primary function of red blood cells in relation to the alveoli?
To assist in gas exchange
What is the purpose of renewing the air in the lungs through breathing?
To keep the oxygen concentration high in the alveoli.
Why do cells all over the body use oxygen during aerobic respiration?
To release energy from food molecules.
How did Tom Sietas save oxygen by keeping very still?
By reducing his use of energy and cutting respiration to a minimum.
What do muscle cells primarily use energy from respiration for?
To keep themselves alive and warm.
Why is it important for gas exchange to occur as fast as possible between the alveoli and red blood cells?
To maximize oxygen concentration in red blood cells.
What is the main reason Tom Sietas filled his lungs with pure oxygen before setting the breath-holding record?
To increase the amount of oxygen in his blood
Why did Tom Sietas keep totally still once he was in the water?
To conserve oxygen in his blood
How did the cold water contribute to Tom Sietas' ability to hold his breath for a long time?
Slowed down his heart rate
Why does a lung full of pure oxygen supply more oxygen than a lung full of air?
Pure oxygen contains a higher concentration of oxygen molecules
What effect did sitting still have on Tom Sietas' respiratory rate?
Slowed down his breathing rate
Why did Tom Sietas avoid trying to break breath-holding records at home?
Due to potential risks related to extended breath-holding
Learn about the exchange of oxygen and carbon dioxide in the respiratory system. Discover how oxygen moves from the alveoli to the capillaries and the role of diffusion in this process.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
