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 4.11-4.18
idk
| Question | Answer |
|---|---|
| What is the primary driving force behind the process of diffusion? | The concentration gradient |
| What is the primary process by which water moves across a selectively permeable membrane? | osmosis |
| Why is facilitated diffusion considered a passive transport process? | It moves substances down their concentration gradient without expending cellular energy |
| Which type of transport protein acts like a pore in the membrane? | channel proteins |
| What triggers the opening of gated channel proteins? | Changes in membrane voltage, binding of chemical ligands, or mechanical stress |
| How do carrier proteins function in facilitated diffusion? | Binding to molecules, changing shape, and moving through to the other side |
| If a freshwater fish is placed in saltwater, what is likely to happen to its cells? | The cells would lose water and shrivel up |
| What is the effect of placing a plant cell in a hypotonic solution? | It will absorb water and get larger |
| What mechanism do freshwater protists use to prevent excess water from entering their cells? | The contractile vacuole |
| What types of things can easily diffuse across the plasma membrane? | Small, nonpolar molecules and small, uncharged polar molecules |
| At equilibrium, what happens to the movement of molecules across the cell membrane? | It does not stop and has dynamic equilibrium |
| Which type of transport requires the assistance of proteins? | Active transport (facilitated diffusion) |
| What is the primary function of the cell membrane's selective permeability? | To ensure the right things are coming in and out of the cell, maintaining homeostasis |
| Which type of transport requires energy from the cell? | Active transport |
| What role do transport proteins play in cell transport? | They facilitate movement of ions, polar molecules, and larger substances across the membrane |
| Which of the following molecules can easily pass through the phospholipid bilayer? | Small, nonpolar, and hydrophobic molecules |
Created by:
libbyig