Cellular Transport Flashcards
What is passive transport?
moves molecules through plasma membrane from areas of high concentration to low
What are the 3 types of passive transport?
Diffusion, osmosis, and facilitated diffusion
What is diffusion?
movement of particles through plasma membrane from areas of high concentration to low
What is the rate of diffusion affected by?
temperature, size, pressure, concentration
What is concentration gradient?
difference of concentration from one place to another
What is osmosis?
diffusion of water from areas of high concentration to areas of low
What is facilitated diffusion?
diffusion of molecules through transport proteins from areas of high concentration to low
What are the two typed of transport proteins?
channel proteins and carrier proteins
What are channel proteins?
open and close to let molecules through
What are the carrier proteins?
change shape to let through molecules
What are the three types of solutions?
Isotonic, hypotonic, and hypertonic
What are isotonic solutions?
If a cell is in a solution in which there is equal amount of water and solute, the solution is isotonic
What are hypotonic solutions?
If a cell is in a solution that has less solute than the cell, the solution is said to be hypotonic
What is a rule for hypotonic solutions?
If too much water diffuses into the cell, the cell will burst. But this rule does not apply to plant cells because of their vacuoles.
What are hypertonic solutions?
If a cell is in a solution that has more solute than the cell, it is said to be a hypertonic solution
