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
bio-ch 5
| Question | Answer |
|---|---|
| what is passive transport? | the movement of molecules across the cell membrane without using energy (ATP) |
| What is diffusion? | movement of molecules from an area of higher to lower concentration driven by kinetic energy until equilibrium is reached |
| what do molecules move across the cell membrane based on? | small enough to pass through pores in the membrane, lipid soluble (nonpolar), and uncharged molecules |
| what is the concentration gradient? | difference in concentration across a distance; molecules naturally move from more to less concentration; greater the difference in concentration, the faster the movement |
| what is osmosis? | diffusion of water across a membrane with the gradient |
| what is the direction of osmosis determined by? | the solute concentrations on both sides of the membrane |
| what does hypertonic mean? | the solute concentration on the outside of the cell is higher than inside the cell |
| what is hypertonic called in a plant cell? | plasmolysis |
| what is hypertonic called in an animal cell? | crenation |
| what does hypotonic mean? | the solute concentration on the outside of the cell is lower than inside the cell |
| what is hypotonic called in a plant cell? | turgor pressure |
| what is hypotonic called in an animal cell? | lysis |
| what's does isotonic mean? | the solute concentration outside the cell is equal to inside the cell |
| in what type of osmosis are cells in homeostasis? | isotonic |
| what is facilitated diffusion? | when molecules bind to a carrier protein on one side of the cell membrane |
| does a carrier protein change its shape? | yes |
| carrier proteins move down the _________ _______________ | concentration gradient |
| what is an ion channel? | proteins that provide small passageways across the cell membrane through which specific ions can diffuse (only works for certain ions) |
| what is active transport? | movement of molecules across the cell membrane from an area of low concentration to high concentration |
| what is an Na/K pump? | Sodium-Potassium pump; moves 3 Na+ ions into the cell's external environment for every 2 K+ ions it moves into the cell |
| what is endocytosis? | when cells ingest external materials by folding around them and forming a pouch |
| what is pinocytosis? | engulfing of solute/fluids |
| what is phagocytosis? | engulfing of large particles of food or cells |
| what is exocytosis? | vesicles are made by the cell fuse with the cell membrane releasing their contents (wastes/excess water) into the external environmet |
Created by:
gschultz2028