Cell membrane
Phospolipid bilayer
True or false Passive transport uses energy?
False Passive transport does not use energy because the molecules are traveling from High to low
True or false Active transport uses energy?
True Active Transport does need energy because the molecules are traveling from low to high
Osmosis only involves which kind of substance
H2O
Does Diffusion use energy?
No, diffusion does not require energy
What are the different parts of the Phospholipid
Hydrophobic tails
Hydrophillic heads
What is Isotonic?
The concentration of solutes is the same inside and outside the cell. Water molecules move equally in both directions
How are small molecules and Ions moved across the membrane?
Protein pumps ( Proteins embedded in the membrane that bind substances on one side of the membrane, change share + release of the substance on the other side of the membrane)
Osmosis is the process of moving water from a ___
to a ___ concentration of molecules
From a HIGH to a LOW concentration of molecules
Define Concentration Gradient:
The difference in Water concentration and solute.
These parts of the cell membrane identify substances
Carbohydrate chains
What is a Hypertonic solution?
The solution has a higher solute concentration outside of the cell. A net movement of water molecules moving out of the cell causing it to shrink.
Large molecules and large amounts of small molecules can be transported across the cell membrane in vacuoles with use of energy
Bulk energy
IF water moves out of a cell what kind of solution is it in
hypertonic
Define the process of Diffusion:
The process of which particles move from an area of high concentration to low concentration.
These act as tunnels for diffusion
membrane proteins
What is Hypotonic?
The solution has a lower solute concentration than the outside of the cell. A net movement of water molecules moving into the cell causing it to swell
Why can’t the cell just save energy and use diffusion to transport substances
Using energy + protein pumps allows a cell to concentrate substances in a particular location, even when forces of diffusion might tend to move these substances in the opposite direction.
If water moves into a cell what solution if it in
Hypotonic
Is the process of diffusion limited to one specific particle or molecule?
No. The process of diffusion is not limited to one specific molecule. It allows any given molecule to pass through a membrane.
The cell membrane can move and flow around with many different bits and pieces. This is why some call it a...
fluid mosaic
If the Outside of the cell has {80% solute & 20%s solvent and the Inside of the cell has { 90% Solute & 10% Solvent, tell me A: whether the solution outside the cell is hyper, hypo, or isotonic, B: The net movement of water and C: what will happen to the cell?
A: Hypotonic B: Water goes into the cell C: the cell swells
Define or create a table of the difference between Exocytosis and Endocytosis
Exocytosis
Exo= Outside
Cyto= cell
Release large amounts of material
During exocytosis, the membrane of the vacuole fuses with the cell membrane, forcing out of the cell
Endocytosis
Endo= Inside the cell
Cyto= Cell
What movement occurs in the cell membrane if it is in an isotonic solution
There is equal movement between water inside and outside of the cell
What are some examples of diffusion?
Examples include O2 or CO2 moving in or out of the cell.
(Osmosis could be an example of diffusion in some examples.)