adaptations for gas exchange

Question 1

diffusion of gases in and out needs to happen what

Answer 1

rapidly and efficiently

Question 2

what is the surface where diffusion of gases called

Answer 2

a respiratory surface

Question 3

an example of a respiratory surface in fish

Answer 3

the gills

Question 4

an example of a respiratory surface in mammals

Answer 4

in the alveoli in the lungs

Question 5

an example of a respiratory surface in insects

Answer 5

in the trachea

Question 6

an example of a respiratory surface in leaves

Answer 6

the sponge mesophyll

Question 7

what does all of these being efficient at gas exchange mean

Answer 7

that they are excellent respiratory surfaces

Question 8

are the essential features of exchange surfaces the same in all organism

Answer 8

yes

Question 9

for a rapid diffusion of gases a respiratory surface must have what

Answer 9

-have a large enough surface area, relative to the volume of the organism
-be thin
-be permeable
-have a mechanism

Question 10

why must a respiratory surface have a large enough surface are, relative to the volume of the organism for rapid diffusion

Answer 10

it must have a large enough surface area, relative to the volume of the organism so that the rate of gas exchange satisfies the organisms needs

Question 12

why must a respiratory surface be permeable for rapid diffusion

Answer 12

it must be permeable so that the respiratory gases diffuse easily

Question 13

why must a respiratory surface have a mechanism for rapid diffusion and how does it do it

Answer 13

they need to have a mechanism to produce a steep diffusion gradient across the respiratory surface by bringing oxygen or removing carbon dioxide rapidly.

Question 14

what adaptations do single celled organisms have for gas exchange

Answer 14

-a large surface area to volume ratio
-cell membrane is thin so diffusion into the cell is rapid
-a single cell is think so diffusion distances inside the cell are short