because diffusion alone is not sufficient as they have a small surface area to volume ratio
1 of 19
what is the word formular for respiration
glucose + oxygen = carbon-dioxide + water (and energy)
2 of 19
how do humans breath in?
contraction of the diaphram and intercostal muscules lifts the rib cage up and out (pulling the plural membrane outwards), this invreases the volume inside the lungs and decreases the pressure. Air moves in from outside (high to low pressure)
3 of 19
what is dead space?
air in airways where there is no gaseous exchange
4 of 19
why will there allways be residual air in lungs
cartilage keeps trachea and bronchi open so they cant collapse completely
5 of 19
where can exchange surfaces be found in human?
alveoli walls, small intestine
6 of 19
where can exchange surfaces be found in plants
root hair
7 of 19
what is the mechanism used to measure breathing
spirometer
8 of 19
what removes CO2 from spirometers?
soda limb
9 of 19
what is tidal volume?
change in volume for regular breaths
10 of 19
what is Vital capacity?
range in volume from inspiratory reserve to expiratory reserve
11 of 19
why is the cartilage in the Trachea C shape?
strong but flexible -allows for expansion, but prevents collaps
12 of 19
what is the function of smoothe muscle in the air ways?
to contact so it can control air flow
13 of 19
what is the function of elastic fibers in the air ways?
recoil to allow airways to dilate
14 of 19
what is the function of cillated epithelium in the air ways?
cillia wafts mucus (with pathogens trapped) up to the throught to be swallowed (killed in stomache) or removed from body
15 of 19
what is the function of goblet cells in the airways?
to secrete mucus (witch will trap pathogens)
16 of 19
what is the order of airways?
Trachea, Bronchi, bronchioles, alveoli
17 of 19
what is the alveoli walls made up of?
one cell thick, of squamous epithelial and surfactant cells
18 of 19
why do alveoli need surfactant?
to reduce surface tension between alveoli (don't stick), allow oxygen to diffuse
19 of 19
Other cards in this set
Card 2
Front
what is the word formular for respiration
Back
glucose + oxygen = carbon-dioxide + water (and energy)
Comments
No comments have yet been made