Lab 4 Diffusion & Osmosis Flashcards
0
Q
Solute is:
A
Substance dissolved in water
1
Q
If you were to identify the most important requirement for sustenance of life it would probably be:
A
-water
2
Q
Diffusion:
A
- is NOT a process requiring cellular energy
- is NOT the movement of molecules from a region of higher concentration to lower concentration
- does NOT occur across selectively permeable membranes
3
Q
Cellular membranes:
A
- are selectively permeable
- control the movement of substances in and out of cells
- have passive transport if permeable to the substance
4
Q
Dialysis tubing:
A
- is selectively permeable
- can be used in experiments to simulate cellular membranes
- is permeable to water, but not to sucrose
5
Q
Osmosis:
A
-is diffusion of water across a selectively permeable membrane.
6
Q
When the cytoplasm of a plant cell is pressed against the cell wall, the cell wall is said to be:
A
-turgid
7
Q
Hypertonic is defined as:
A
The solution on one side of the membrane contains a greater amount of solute than the other side
8
Q
If one solution contains 10% NaCl and another contains 30% NaCl, the 30% solution is said to be:
A
Hypotonic
9
Q
When there are equal numbers of solute molecules on each side of the cell membrane:
A
- there will be equal movement of water in and out of cell.
- the solution and cell are said to be isotonic.
