Transport & Gas Exchange Flashcards
1
Q
Substances that the body needs to excrete:
A
1) CO2
2) urea
2
Q
Substances that the body needs to ingest
A
1) oxygen
2) nutrients
3) water
4) vits and mins
3
Q
Function of o2 in the body?
A
Vital for respiration: transfers energy from glucose to cells
4
Q
Why do we need water?
A
Dissolves vital nutrients in bloodstream and delivers them to cells
5
Q
Adaptions of lungs for gas Exchange?
A
Alveoli: short diffusion pathway, large surface area, moist inner lining(dissolves the gas opto increase raye of diffusion), good blood supply, well ventilated
6
Q
SA:Vol=
A
Surface area/volume
7
Q
SA:Vol decreases when…
A
Size of an organism increases
