Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Chapter 7- Membranes
Membrane Structure and Function
| Question | Answer |
|---|---|
| What is the function of phospolipids? | They maintain the barrier between the inside and outside of the cell by making up a phospolipid bilayer. |
| What does it mean if a membrane is selectively permeable? | The membrane can choose or select which molecules it will let pass through the membrane. |
| What is the diffusion of water also called? | Osmosis |
| What happens when a cell is placed in a hypotonic solution? | Animal cells may swell and burst. Plant cells become turgid and pressurized. |
| What type of transport does not use energy and works with the concentration gradient? | Passive transport |
| What is the difference between exocytosis and endocytosis? | Exocytosis is removing large particles out of the cells (exiting) and endocytosis brings large particles into the cell. |
| Besides osmosis what is another way that water can enter or leave the cell? | Aquaporins, which form a channel through the cell membrane. These are especially used in the cells of kidneys. |
| What happens to a cell in a hypertonic solution? | Animal cells shrivel up and plant cells undergo plasmolysis (cell membrane pulls away from the cell wall). |
| What is the difference between diffusion and facilitated diffusion? | Facilitated diffusion uses a transport protein to move the molecule across the membrane. In diffusion the molecule moves on its own. |
| What are the two characteristics of active transport? | It uses energy and moves against the concentration gradient (from low to high) |
| What type of solution will cause no change to the cell and water enters and leaves at an equal rate? | Isotonic |
| What are the two main typed of endocytosis? | Phagocytosis- bringing in large substances "cellular eating" Pinocytosis- bringing in liquids and dissolved matterials "cellular drinking" |
| What is the sodium-potassium pump an example of? | active trasport- exchanges sodium for potassium across cell membrane. Bringing the soduim from its higher concentration and pushing out the potassium to its lower concentration |
| What is cotransport? | Moving one substance by transporting another- cell moves H+ protons out of the cell so it can move sucrose molecules into the cell. |
| When a cell regulates its solute concentration and water balance what is it called? | Osmoregulation |
Created by:
nicole52806
Popular Biology sets