exchange surfaces

Question 1

SA:V ratio of single celled organisms

Answer 1

large

Question 2

features of exchange system

Answer 2

increased SA
thin layers
good blood supply

Question 3

key features of mammalian exchange system

Answer 3

nasal cavity
trachea
bronchus
bronchioles 
alveoli

Question 4

name 2 ways of measuring lung capacity and how they work

Answer 4

spirometer= measure lunch volume and breathing patterns

peak flow meter= measures rate at which air can be expelled

Question 5

name and define components of lunch volume

Answer 5

tidal volume= volume of air that moves in during resting breath
vital capacity= volume of air that can be breathed in with strongest breath after strongest exhale
inspiratory reserve volume= max air you can breathe in after normal inhalation
expiratory reserve volume= max air you can breathe put after normal (tidal volume) exhale
residual volume= amount of air left in lungs after harvest exhale
total lunch capacity= sum of vital capacity+ residual vol

Question 6

define ventilation rate

Answer 6

total volume of air inhaled in 1 min

tidal vol X breathing rate