movement of substances

Question 1

what is diffusion

Answer 1

this is the movement of particles from an area of higher concentration to an area of lower concentration

Question 2

what is osmosis

Answer 2

the movement of water molecules for an area of higher concentration to an area of lower concentration accrose a partially permeable membriane

Question 3

what is acitve transport

Answer 3

this is the movement of particle agint hte contraction gradient
this is by carrier proteins which are embedded in the cell membrane

Question 4

how does surface are to volume ratio affect movement of substances

Answer 4

this means that more substance can be moved compared to the area

Question 5

where is active transport used

Answer 5

intestine, root hair cells.

Question 6

how does the intestine improve its absorption rate

Answer 6

thin walls so they are only on cell this is so they can be absorbed quicker.
increasing in temperature

Question 7

how to test for diffusion

Answer 7

potassium permanganate crystals added to water

Question 8

where is diffusion used

Answer 8

alveoli
to exchange oxygen and carbon dioxide
also it has one cell thick so more can be transported quicker.

Question 9

how to test for osmosis

Answer 9

visking tubing bag
fill with sucrose and put in water
then if the level rises osmosis has occurred

Question 10

how to test for living organisms

Answer 10

putting potatoes into distilled water and sucrose solutions of increasing conc