Text Flashcards
When both inside and outside of a cell have the same amount of water it is said that the cell has reached a state of
Equilibrium
Which is true about active transport?
It requires energy
And goes from low concentration to high concentration
This type of transport requires ENERGY and goes from LOW to HIGH concentration?
Active
A cell placed in a hypertonic solution will
Shrivel
Hypertonic solutions
make cells shrink
Osmosis is the movement of
across a membrane.
Water
Which is true about passive transport?
ATP is not required
molecules move from high to low
Hypotonic solutions
make cells swell
Active transport requires
~ concentration to
to move particles from an area of concentration to Concentration
Energy
Low
High
What forms the channels and pumps in the phospholipid bilayer?
proteins
A cell placed in a hypotonic solution will
swell
The function of the plasma membrane is….
To regulate what enters and leaves the cell
The movement of molecules against a concentration gradient
active transport
Why is diffusion and osmosis important to cells?
It allows them to take in materials without using energy.
O2 and CO2 would pass through the cell membrane using this method?
Simple Diffusion
In an isotonic solution, water will move
in and out of the cell randomly
Selective permeability membrane means that:
some substance pass through while some are kept out
Movement of large and/or charged molecules across a cell membrane using a protein channel
Facilitated diffusion
Do
simple diffusion
Facilitated diffusion
And
Osmosis use energy
No
Does active transport need energy
Yes
Does passive transport need energy
No
The higher the concentration of dissolved particles in a solution = the less water molecules there are
Hypertonic
The lower the concentration of dissolved particles in a solution=The more water molecules there are
Hypotonic
An equal concentration of dissolved particles in a solution as the inside of the cell
Isotonic
