CELL REVIEW
DIFFUSION 1
DIFFUSION 2
OSMOSIS
ACTIVE TRANSPORT
100
What is the structure that serves as the cell's boundary from its environment?
Cell Membrane
100
Diffusion is a type of __________ transport.
PASSIVE
100
How do different types of molecule enter our cells?
DIFFUSION
100
How is OSMOSIS different that DIFFUSION
OSMOSIS refers only to water molecules while DIFFUSION refers to all different types of molecules.
100
TRUE of FALSE: Active transport requires the use of ENERGY
TRUE
200
What is the control center of the cell?
NUCLEUS
200
In DIFFUSION molecules move from _______ concentration to _______ contentration.
HIGH concentration --> LOW concentration
200
Cells are usually surrounded by _________.
FLUID
200
TRUE or FALSE: In osmosis water molecules move from low concentrations to high concentrations.
FALSE
200
What kind of energy does ACTIVE TRANSPORT require?
ATP
300
The prefix "BI" in the word BILAYER means...
TWO
300
What is a selectively permeable membrane?
A membrane that allows some molecules and other particles to enter and exit while blocking others
300
What are the three types of solutions?
Hypotonic, Hypertonic & Isotonic
300
In a salt solution (made of water+salt), what is the SOLUTE and what is the SOLVENT?
Solute = SALT Solvent = Water
300
Active transport is the movement of molecules from an area of ______ concentration to an area of _______ concentration.
Active transport = Low concentration --> High concentration
400
What organelle is responisble for the release of ENERGY?
Mitochondria
400
Facilitated (facilitate=to make easier) diffusion requires the use of _______ ________.
Transport proteins
400
TRUE or FALSE: Facilitated diffusion requires the use of energy.
FALSE. Facilitated diffusion is a type of passive transport (requires NO ENERGY) where molecules move DOWN their concentration gradient.
400
In a HYPOtonic solution the solution has a _________ concentration of solutes than the cell. Water will diffuse ______ the cell causing the cell to ________.
HYPOtonic solution = solution has a LOWER concentration of solutes than the cell. Water will diffuse INTO the cell causing the cell to GROW LARGER.
400
Active transport helps explain how_______________________.
Water from soil enters a plant root.
500
What is one main difference between prokaryotes and eukaryotes?
PROKARYOTES DO NOT have a NUCLEUS EUKARYOTES HAVE a NUCLEUS
500
In an ISOTONIC solution, what happens to cell size? WHY?
Cell size remains constant because water moves into and out the cell at EQUAL rates.
500
Yesterday in the lab, what kind of solution caused the onion skin cells to SHRINK?
A salt solution
500
An animal cell surrounded by fresh water will burst because the OSMOTIC PRESSURE causes
WATER to move INTO THE CELL.
500
What is a concentration gradient?
CONCENTRATION GRADIENT=the difference in the concentration of a substance from one location to another
Click to zoom
M
e
n
u