Active And Passive Cell Transport

Front 1

What are the two forms of cell transport and what is the difference between the two kinds?

Back 1

Active and Passive. Active requires energy and Passive does not require energy. Active transport goes against the gradient (from area of higher level of concentration to lower level of concentration.)

Front 2

What changes would occur in a cell placed in an isotonic solution?

Back 2

there would be an equal amount of solute on the inside and outside of the cell.

Front 3

What changes would occur in a cell placed in a hypotonic solution?

Back 3

Water would flow into the cell due to the fact that water will flow from greater to lesser concentration. There is less solute on the outside of the cell and therefore there is more water on the outside. So, the water will enter the cell and make it get larger.

Front 4

What changes would occur in a cell placed in a hypertonic solution?

Back 4

When a cell is in a hypertonic environment, water will leave the cell because there is more solute on the outside of the cell and therefore more water on the inside of the cell than on the outside. Since water travels from area of most concentration to area of lesser concentration, the water will leave to go to the outside of the cell where there is a lesser amount of water due to the greater amount of solute there. It will cause the cell to shrink.

Front 5

What are the differences between osmosis and diffusion.

Back 5

Osmosis is the diffusion of water. Diffusion is when molecules move from areas of greater to lesser concentration. Osmosis is the net movement of water through a selectively permeable membrane.

Front 6

What is turgor pressure? How does turgor pressure affect plants?

Back 6

Internal pressure caused by H20 that keeps plants upright. Plants with low turgor pressure are limp.

Front 7

What is the difference between endocytosis and exocytosis?

Back 7

Endocytosis surrounds an organism and takes it into a cell or organism and out of its environment and exocytosis expells materials from a cell or organism.

Front 8

What is plasmolysis?

Back 8

When plant cells lose their turgor pressure and wilt.

Front 9

Define active transport

Back 9

Moves materials against the concentration gradient (from lesser to greater concentraion) using energy

Front 10

What are the three types of active transport?

Back 10

Sodium and potassium pump, endocytosis/phagocytosis, and exocytosis.

Front 11

What is endocytosis... or more specifically phagocytosis

Back 11

"cell-eating"... the cell surrounds and takes materials from environment forming a vacuole.

Front 12

what is exocytosis?

Back 12

exocytosis is when materials are expelled from the cell

Front 13

what is Na+ and K+ Pump?

Back 13

When sodium leaves the cell and potassium pumped into the cell, it requires ATP,
this pump is needed for nerve impulses.

Front 14

what are the three forms of passive transport?

Back 14

Diffusion, osmosis, and facilitated diffusion

Front 15

what is the definition of diffusion?

Back 15

Diffusion is when molecules move from areas of greater to lesser concentration.

Front 16

Define osmosis.

Back 16

Osmosis is the diffusion of water through a selectively permeable membrane.

Front 17

What is facilitated diffusion?

Back 17

Facilitated diffusion is the diffusion of molecules through a protein channel (example: glucose)

Front 18

what are the three types of cellular environments?

Back 18

Hypotonic, hypertonic, and isotonic

Front 19

what is a solute?

Back 19

The substance that is being dissolved in a solution

Front 20

What is a solvent?

Back 20

The substance that dissolves a solute in a solution.

Front 21

Define concentration

Back 21

Concentration is the measure of the amount of solute in a certain volume of solution.

Front 22

What is the equation of concentration

Back 22

Concentration equals the mass of solute over the volume of the solution.

Front 23

Why is water unable to pass through the cell membrane easily?

Back 23

Water cannot pass through the cell membrane easily because it is polar.

Front 24

Why can oxygen easily pass through the cell membrane

Back 24

because it is small and it is nonpolar.

Front 25

define passive transport.

Back 25

passive transport requires no energy and molecules move from areas of higher concentration to lower concentration

Front 26

define active transport.

Back 26

active transport requires energy. molecules move from an area of lesser concentration to an area of greater concentration.

Front 27

what are two substances that can cross the cell membrane

Back 27

oxygen and carbon dioxide

Front 28

what is a substance that is too large to diffuse across the cell membrane?

Back 28

glucose, or larger substances.

Front 29

what prevents charged molecules from diffusing across the cell membrane?

Back 29

they are polar and cannot go through the fatty acid tails.

Front 30

How is facilitated transport different from diffusion?

Back 30

facilitated transport moves substances using protein channel, and diffusion does not.

Front 31

how is facilitated transport similar to simple diffusion?

Back 31

they both are forms of passive transport and both pass molecules from high concentration to low concentration. they both require no energy.

Front 32

does active transport require energy input?
does active transport move molecules against their concentration gradients?
does active transport require a membrane protein?
Is sodium-potassium pump an example of active transport?

Back 32

yes to all four

Front 33

does facilitated transport require energy input?
does facilitated transport move molecules against their concentration gradient?
does facilitated transport require a membrane protein?
is sodium-potassium pump an example of facilitated transport?

Back 33

no, no, yes, no

Front 34

does diffusion require energy?
does diffusion move molecules against their concentration gradients?
Does diffusion require a membrane protein?
is sodium potassium pump an example of diffusion?

Back 34

no, no, no, no