Biology, Chapter 34.2, Respiratory System

What parts are responsible for the exchange of gases in the respiratory and circulatory systems?

Alveoli, capillaries and blood

What is the surface area of your skin?

Approximately 1.75 m2

What are three disorders of the respiratory system?

Asthma, Bronchitis, Lung cancer

How would respiration be affected if you were running?

Breathing and respiratory rates would increase.

What are the mechanics of inhalation and exhalation?

Inhalation-diaphragm contracts, chest cavity expands, air pulled into lungs. Exhalation-diaphragm rises, chest cavity shrinks, air pushed out of lungs.

How is the air you inhale different from the air you exhale?

Inhale - more oxygen Exhale- more carbon dioxide

What is the difference between internal and external respiration?

Internal exchanges gases between blood and body cells. External exchanges bases between atmosphere and blood.

Why do we not use our total inhalation capacity?

It provides only what we need when we're resting, and only use extra when we're active.

Does exercise affect metabolism?

No, it only creates more oxygen used, and more carbon dioxide produced.

How would respiratory system compensate for a circulatory disorder?

Respiratory system would have to work harder.

How would respiration be affected if you were sleeping? Walking to school?

They would slow down. They would increase.

What is the path of air from the nasal passages to the bloodstream?

Through the nose, past the pharynx, down the trachea, down the bronchi, through the bronchioles, into alveoli, through capillaries, into bloodstream.

What is the main function of the respiratory system?

To provide oxygen to the body and to remove carbon dioxide.

What is an advantage of heating and moisturizing air before it reaches the alveoli?

Warm moist air helps keep the alveoli moist so it can diffuse gases.

Are the alveoli and capillaries similar?

Yes, they both contain one thin layer if tissue.

What is the mechanism for gas exchange?

diffusion