Respiratory

Oxygen and carbon dioxide are exchanged in the lungs and through all cell membranes by ________.

Diffusion

Filtration

Active transport

Osmosis

The amount of air that can be inspired above the tidal volume is called ________.

Inspiratory reserve

Vital capacity

Reserve air

Expiratory reserve

Most inspired particles such as dust fail to reach the lungs because of the ________.

Action of the epiglottis

Porous structure of turbinate bones

ciliated mucous lining in the nose

Abundant blood supply to nasal mucosa

Which of the following provide the greatest surface area for gas exchange?

Alveolar ducts

Alveolar sacs

Alveoli

Respiratory bronchioles

How much does an average human breathe every day?

1-8,000

8,000-17,000

17,000-30,000

30,000-45,000

How many times per minute do we breathe?

1-12

12-20

20-28

28-36

Air moves out of the lungs when the pressure inside the lungs is _________.

Equal to the pressure in the atmosphere.

Greater than the pressure in the atmosphere.

Greater than the intra-alveolar pressure.

Less than the pressure in the atmosphere.

Smoking diminishes ciliary action and eventually destroys the cilia.

True

False

Which of the two lungs is bigger in the human body?

Right

Left

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