Osmosis Flashcards
1
Q
Define osmosis
A
- movement of water from low solute to high solute concentration
2
Q
what are osmolytes?
A
- osmotically active molecules that affect osmosis (IONS or ORGANIC MOLECULES)
3
Q
The skin/surface of fish are selectively permeable. What does this mean?
A
- allows for movement of water but not solute
4
Q
Define osmotic pressure
A
- pressure needed to prevent flow of water by osmosis (expresses concentration of solutions proportional to [solute]
5
Q
What occurs in hypertonic solutions?
A
- higher conc. in solution than cell = shrink
6
Q
What occurs in hypotonic solutions?
A
- lower conc. in solution than cell = swell
7
Q
What occurs in isotonic solutions?
A
- equal conc. of ions in solution and cell = okay
