Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
19 Cards in this Set
- Front
- Back
|
the most important compound for sustenance of life |
water |
|
|
What is a solvent? |
the substance in which solutes are dissolved |
|
|
What is diffusion? |
the movement of molecules from a region of higher concentration to one of lower concentration |
|
|
What do cellular membranes contain? |
consist of a phospholipid bilayer containing embedded proteins control the movement of substances in and out of cells selectively permeable |
|
|
examples of a solute |
NaCl sucrose |
|
|
Describe a dialysis membrane |
selectively permeable used in experiments to stimulate cellular membranes pores that allow passage of specific molecules |
|
|
What is osmosis? |
diffusion of water across a selectively permeable membrane |
|
|
when the cytoplasm of a red blood cell has lost water to its surroundings |
hemolyzed |
|
|
when the cytoplasm of a plant cell is pressed against the cell wall |
turgid |
|
|
What is a cholera? |
disease where rapid dehydration takes place |
|
|
Why are cell membranes said to be selectively permeable? |
allow some substances to move easily into and out of cell because of phospholipid bilayer |
|
|
3 types of solution |
isotonic hypertonic hypotonic |
|
|
What is a solute? |
substance being dissolved in solvent |
|
|
What is a solution? |
combination of solute and solvent |
|
|
the solution's solute concentration compared with that of another solution |
tonicity |
|
|
During the experiment with osmosis, which bag lost the most weight and which gained the most weight? |
the bag with water inside and sucrose outside lost the most weight bc water left the bag the bag with sucrose inside and water outside gained the most weight bc water came inside the bag |
|
|
treatment for cholera
|
oral rehydration therapy |
|
|
How does molecular weight related to the solute and temperature in the rate of diffusion? |
The higher the molecular weight, the diffusion rate decreases. As temperature increases, the rate of diffusion increases. |
|
|
Which molecules moved in the selective permeability of membranes? |
Glucose came out of bag, starch stayed in. |
