2.4 Revision

Cell Membranes

1

This word in the model name refers to the idea that cell membranes contain phospholipids with proteins embedded

Mosaic

2

This word in the model name refers to the idea that the molecules in the membrane move over each other.

Fluid

3

Phospholipids take one of these two forms

Micelle, bilayer

4

This is the optimum temperature for cell membranes in the human body

37C

5

These cell surface proteins are involved in blood types

Glycoproteins

Diffusion

1

Diffusion occurs from _____ to _______ concentration

High to low

2

What types of molecules can diffuse across the plasma membrane?

Small, non-polar, uncharged

3

How can surface area be adapted for diffusion?

Large surface area

4

Aside from concentration gradient, this affects the rate of facilitated diffusion

Proteins 

5

These two types of protein are used for facilitated diffusion

Carrier and channel

Osmosis

1

Osmosis is the movement of this specific molecule

Water

2

Pure water is at this pressure

0kPa

3

This term describes the ability of water molecules to move freely in solution

Water potential

4

This term describes what happens to a plant cell when placed in a hypertonic solution

Plasmolysis

5

Movement of solutes into a cell affects water potential in this way

Lowers the water potential

Active transport

1

Active transport requires this molecule

ATP

2

Active transport is used to move these into the root hair cells of a plant

Minerals/ions

3

This type of protein is used for active transport

Carrier proteins

4

This happens to the protein after hydrolysis and release of energy

It changes shape

5

Inhibition of this bioenergetic process inhibits active transport

Respiration

Chance

1

What was the independent variable in the osmosis RP?

Concentration of sucrose solution

2

This method of active transport involves the movement of glucose and sodium in the same direction

Co-transport

3

The formation of these in cold temperatures causes damage to the membrane

Ice crystals

4

This number of sodiums are exchanged for potassium in the sodium-potassium pump

Three

5

This single organ carries out osmosis, diffusion, facillitated diffusion, co-transport of glucose and active transport of ions

Kidney