The Respiratory System Key Terms

Question 1

tidal volume

Answer 1

the volume of air breathed in or out per breath

Question 2

inspiratory reserve volume

Answer 2

the volume of air that can be forcibly inspired following a normal breath

Question 3

expiratory reserve volume

Answer 3

volume of air that can be forcibly expired following a normal breath

Question 4

residual volume

Answer 4

volume of air that remains in the lungs after maximum expiration

Question 5

minute ventilation

Answer 5

volume of air breathed in or out per minute

Question 6

diffusion

Answer 6

the movement of a substance from an area of high concentration to an area of low concentration

Question 7

partial pressure

Answer 7

the pressure of an individual gas when it exists amongst a mixture of gases

Question 8

concentration gradient

Answer 8

the process of particles moving through a solution or gas from an area with a higher number of particles to an area with a lower number of particles

Question 9

strech receptors

Answer 9

a sensory receptor that responds to the over-expanding of the lungs

Question 10

inspiratory centre

Answer 10

located in the medulla oblongata and responsible for breathing (inspiration)

Question 11

expiratory centre

Answer 11

locatedin the medualla oblongata and responsible for breathing (expiration)

Question 12

cilia

Answer 12

tiny cells located in the bronchi and bronchioles

Question 13

nicotine

Answer 13

an addictive stimulant found in cigarettes

Question 14

tar

Answer 14

a toxic substance found in cigarette smoke