1.2 The Respiratory System

Question 1

Diffusion

Answer 1

Movement of gas molecules from high conc to low conc

Question 2

Gaseous exchange

Answer 2

Movement of o2 from air into the blood

CO2 from blood into the air

Question 3

Tidal volume

Answer 3

Volume of air breathed in or out per breath

Question 4

Inspiratory reserve volume (IRV)

Answer 4

Air that can be forcibly inspired after a normal breath

Question 5

Expiratory reserve volume (ERV)

Answer 5

Air that can be forcibly expired after a normal breath

Question 6

Residual volume

Answer 6

Amount of air that remains in the lungs after maximal expiration

Question 7

Spirometer

Answer 7

Device that is used to measure volume of air inspired and expired by lungs

Question 8

Partial pressure

Answer 8

Pressure exerted by an individual gas when it exists within a mixture of gases

Question 9

Conc / diffusion gradient

Answer 9

Explains how gases flow from high to low conc

Steeper gradient means faster diffusion

Question 10

Cilia

Answer 10

Microscopic hair like projections

Sweep away fluids and particles

Question 11

COPD

Answer 11

Chronic and debilitating diseases such as emphysema

Main cause is smoking

Shortness of breath