Cell Biology 2

Question 1

i i i 00 i i Fluid Mosaic model
i i i 00 i i

What does the 0 represent
What does i represent

Answer 1

Protein

Phospholipid bilayer

Question 2

What is the permeability of the fluid Mosaic model

Answer 2

Selectively permeable

Allows small molecules to pass through

Question 3

What are the 3 main ways which substances can enter/ leave cell

Answer 3

Diffusion
Osmosis
Active Transport

Question 4

Diffusion is when you move from a ……. concentration -> ….. concentration

Answer 4

Higher concentration to lower concentration tration

Question 5

What does passive mean

Answer 5

Energy not required

Question 6

Is diffusion a passive process

Answer 6

YES

Question 7

Gases are exchanged in ......... 
Eg
Oxygen                       |
 |  |  |  |                          |
☆☆☆                         | -> Lungs
Carbon dioxide         |
-----------------------------  |

Carbon  dioxide        |
 |  |  |  |                          |
☆☆☆                         | -> body tissue 
Oxygen                       |
-----------------------------  |

Answer 7

Diffusion

Question 8

Osmosis

Answer 8

Movement of water from high to low low concentration (diffusion)
Passive process

Question 9

Osmosis in Plant Cells
When the concentration of water is equal.
What happens to the appearance of the cell?

Answer 9

No change in appearance

Question 10

Osmosis in Plant Cells
When the concentration of water is Higher.
What happens to the cell

Answer 10

Cell is turgid
Vacuole Swells
Cell wall prevents it from bursting

Question 11

Osmosis in Plant Cells

What happens when there is a lower water concentration?

Answer 11

Water flows out cell
Vacuole shrinks
Cell becomes plasmolysed