Movement Into and Out Of Cells

Question 1

Define Particles?

Answer 1

-The smallest pieces of which a substance is made
-Particles can be molecules atoms or ions

Question 2

Define kinetic energy?

Answer 2

-The energy of moving objects

Question 3

Define Diffusion?

Answer 3

-The net movement of particles from a region of high concentration to a region of lower concentration down a concentration gradient as a result of random movement
-The energy for diffusion comes from random movement or ions

Question 4

Define net movement?

Answer 4

-Overall or average movement

Question 5

Define concentration gradient?

Answer 5

-An imaginary slope from a high concentration to a lower concentration

Question 6

How does temperature affect particles?

Answer 6

-The higher the temperature the faster the particles move
-This is because the particles have more kinetic energy which makes them move faster

Question 7

Why does diffusion take place in plants?and what are some of the common examples?

Answer 7

-Diffusion occurs in plants to get rid of wasteful products
-In plants,plants need carbon for photosynthesis they get this as carbon diffuses from the air and enters the stomata.

Question 8

What is a concentration gradient?

Answer 8

-A concentration gradient is a barrier that separates low concentration and the high concentration
-The high concentration is at the top of the slope and low concentration at the bottom of the slope

Question 9

Why does diffusion take place in animals?and what are some common examples?

Answer 9

-Diffusion occurs in animals to get rid or waste products such as carbon dioxide.
-It is importing as it allows for gas exchange between carbon dioxide and oxygen in the alveoli through the cell membrane in the lungs

Question 10

What is a solute?Solvent? and Solution?

Answer 10

-A solute is a substance that has dissolved in a liquid
-The liquid is called the solvent and in organisms is always water
-The solution is the final/full result

Question 11

What are the function of water?

Answer 11

-Water acts as a solvent that dissolves many other substances in itself
-It also acts as transportation of fluids around the body

Question 12

Define independent variable?

Answer 12

-The variable that you change in an experiment

Question 13

Define dependant variable?

Answer 13

-The variable that you measure as you collect your results

Question 14

Define compound?

Answer 14

-A substance formed by the chemical combination of two or more elements in fixed proportion

Question 15

Define partially permeable membranes?

Answer 15

-A membrane (very thin layer) that lets some particle move through it, prevents other passing through

Question 16

Define Osmosis in terms of water potential?

Answer 16

-The net movement if water molecules from a region of high water potential to a region of low water potential through a partially permeable membrane

Question 17

Define High water potential?

Answer 17

-An area where there are not a lot water molecule in a concentration solution

Question 18

Define low water potential?

Answer 18

-An area where there are not many water molecules in a concentration solution

Question 19

Define Turgid?

Answer 19

-A description of a plant cell that is tight and firm

Question 20

Define flaccid?

Answer 20

-A description of a plant cell that is soft

Question 21

Define plasmolysed?

Answer 21

-A description of a plant cell that which the cell membrane tears away from the cell wall

Question 22

Define Turgor pressure?

Answer 22

-The pressure of the water pushing outward on a plant cell wall

Question 23

Define Turgor pressure?

Answer 23

-The pressure of the water pushing outward on a plant’s cell wall

Question 24

Why is water potential and Osmosis important to an Organism?

Answer 24

-Water potential and Osmosis are great importance as they affect how an organism takes and loses water

Question 25

Where do water molecules diffuse to?