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