test Flashcards
what are three types of passive transport?
Osmosis, Simple Diffusion, and Facilitated Diffusion
What is active transport?
when a cell uses energy to transport something( LOW TO HIGH CONCENTRATION USING ATP)
Facilitated diffusion=
LARGE HYDROPHILLIC molecules pass through the bilayer with the help of carrier proteins OR protein channels create a passageway for them to get through
Where does facilitated diffusion come and go
from areas of higher concentration to areas of lower concentration
what is the goal of facilitated diffusion
to achieve homeostasis both inside and outside the cell
Simple Diffusion=
SMALL, HYDROPHOBIC molecules slip through the bilayer
Where does simple diffusion come and go
from areas of higher concentration to lower concentration
what is the goal of Simple Diffusion
to achieve homeostasis
Osmosis=
FLUIDS and GASSES pas through the bilayer
Where does simple diffusion come and go
the fluids move from area of low concentration to areas of higher concentration (of solutes)
what is the goal of Osmosis
to dilute the high concentration area (of solutes) TO ACHIEVE HOMEOSTASIS
How do the carrier proteins take the molecules through the membrane
the carrier proteins latch onto the molecules and pull them through the bilayer
what are the THREE main concepts of CELL THEORY
1) Cells come from other cells
2) All living things are made up of cells
3) The cell is the basic unit of life
Know the Hydro Phobic and Phillic parts of the bilayer
The HEAD is: Hydrophilic (attracts/likes water)
The TAIL is: Hydrophobic (does not like water)
Whats happens to cells when they get too big
they burst and stop functioning because the nutrients cant reach the whole cell
What is Homeostasis
The tendency to achieve balace
How is Homeostasis important in passive and active transport
the cell is constantly moving to try and achieve balance of equal water and solute in and out of the cell
Solvent=
Solvent is the fluid that particles are dissolved in
Solute=
the component in a solution
Hypertonic Solutions=
high concentration osmotic pressure of 2 solutions
Hypotonic Solutions=
low concentration of osmotic pressure in 2 solutions
Isotonic Solutions=
an equal amount of solutes in 2 solutions
Semipermiable=
the membrane is semipermiable because it has tiny microscopic holes that allow fluids in and out
Picture Facilitated Diffusion
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