Osmosis And Diffusion

Question 1

Osmosis

Answer 1

The movement of water across a semi permeable membrane from an area of high water concentration to an area of low water concentration

Question 2

Osmosis is a..

Answer 2

Special type of diffusion that does not require energy

Question 3

What are passive

Answer 3

Osmosis and diffusion

Question 4

If pure water separates from salt water, the following occurs

Answer 4

• Water molecules move randomly in both directions
• salt molecules cannot move out so more water moves into the salt solution
• this is the water moving from high concentration water to lower concentration water (osmosis)

Question 5

Diffusion

Answer 5

The movement of molecules from an area of higher concentration to an areas of lower concentration

Question 6

Active transport

Answer 6

Movement of molecules from a less crowded to a more crowded area with the use of energy

Question 7

Permeable

Answer 7

Lets everything in and out

Question 8

Semi permeable

Answer 8

Lets some things in and out

Question 9

Impermeable

Answer 9

Lets nothing in and out

Question 10

2 examples and diffusion in everyday life

Answer 10

Smell of perfume

Food colouring in water

Question 11

What membranes can pass easily across membranes

Answer 11

Water, oxygen and carbon dioxide

Question 12

What molecules cannot pass across membranes

Answer 12

Salts sugar and proteins

Question 13

What does osmosis require

Answer 13

A semipermeable membrane

Question 14

What do you use in the experiment

Answer 14

Visking tubing
Concentrated sucrose/salt solution
Distilled water

Question 15

Many sea animals have cytoplasm with similar concentration to

Answer 15

sea water

Question 16

Function of kidneys

Answer 16

To make sure fluid in our bodies that surrounds our cells have stable concentration

Question 17

Plants membranes are surrounded by a

Answer 17

Cell wall

Question 18

Plants membranes are

Answer 18

Fully permeable and allow all substances

Question 19

Roots absorb water by

Answer 19

Osmosis

Question 20

Turgor

Answer 20

The pressure of the vacuole and cytoplasm against the cell wall

Question 21

What gives plants their strenghts

Answer 21

Turgor pressure

Question 22

What happens when the outside water enters the plant cell

Answer 22

The vacuole becomes bigger and the cytoplasm swells

Question 23

Turgid

Answer 23

When the cells are fully swelled

Question 24

What happens when bacteria and fungi are placed in a concentrated solution(sugery/salty)

Answer 24

They loose water by osmosis

Question 25

What happens to food when u put them in concentrated solutions

Answer 25

Enzyme action stops and prevents them from growing causing the food to shrivel up and die

Question 26

Examples of food in concentrated solutions

Answer 26

Tinned fruits in sugary solution

Question 27

What happens if an animal cell is in a solution that is less concentrated thats its cytoplasm

Answer 27

The water from outside the call moves into the cell and may cause it to burst or die

Question 28

What happens if an animal cell is more concentrated than its cytoplasm

Answer 28

The water may leave the animal cell causing the cell to shrivel up and may die