Exchange Between Organisms and their Environment Flashcards
1
Q
How do size of an organism and its structure relate to its SA:V ratio?
A
The larger an organism, the lower its surface area to volume ratio.
2
Q
How do larger organisms increase their surface area to volume ratio?
A
-Tissue fluid
-Materials are rapidly distributed to tissue fluid and waste products are returned to the exchange surface for removal
3
Q
How are surfaces adapted to facilitate exchange?
A
-A flattened shape so that everyl is close to the surface
-Specialised exchange surface area to volume ratio; large area
-Very thin
-Selectively permeable
