3B Passive Transport Flashcards
Is ATP required?
No, why it’s called passive
Movement of molecules in diffusion is…
from an area of high to low concentration along the concentration gradient
When does diffusion stop?
When equilibrium is reached
What molecules can pass through in simple diffusion?
Non-polar and hydrophobic, small molecules (like CO2 and O2)
How does facilitated diffusion occur?
a protein channel or a protein carrier. Happens when molecules are too large to pass through simple diffusion.
Movement of molecules in osmosis is…
Water is diffused from areas of high to low concentration of water.
A cell being hypertonic results in..
Cell shrinking due to there being high solute and low water
A cell being hypotonic results in..
Cell growing/bursting due to there being low solute and high water
Isotonic
Equal water and solute, no net movement
