General Flashcards
(4 cards)
1
Q
Where does the exchange of substances from internal and external take place ?
A
Exchange surfaces(specialised structures e.g bacterial cell membrane ,stomata,skin ,gills and lungs)
2
Q
What is tissue fluid and what is its purpose?
A
Fluid by which substances are exchanged
To supply tissues with essential solutes in exchange for waste products between blood and cells
3
Q
What does mass transport maintain?
A
The final diffusion gradient that bring substances to and from the the cell membrane of individual cells
The relatively stable environment “the tissue fluid.”
4
Q
In large organisms what are exchange surfaces associated with?
A
Mass transport systems that carry substances between exchange surfaces and the rest of the body and between parts of the body.
