Movement of Substances into and out of cells

Question 1

what is diffusion?

Answer 1

the net diffusion of particles along a concentration gradient from an area of higher concentration to an area of lower concentration

Question 2

what can the movement of substances into and out of cells be done by?

Answer 2

diffusion, osmosis and active transport

Question 3

what is the effect on the rate of diffusion/osmosis/active transport at a HIGHER TEMPERATURE?

Answer 3

the rate will be faster because the heat will give more energy for the particles to diffuse

Question 4

what is the effect on the rate of diffusion/osmosis/active transport when it comes to the surface area to volume ratio?

Answer 4

the smaller the organism, the larger the SA:VR

Question 5

what is SA:VR?

Answer 5

the calculation of the total surface area of an organism divided by the volume of organism

Question 6

what is the effect on the rate of diffusion/osmosis/active transport when it comes to the CONCENTRATION GRADIENT?

Answer 6

the greater the difference in concentration between 2 regions the faster the rate of diffusion/osmosis/active transport

Question 7

what is osmosis?

Answer 7

the net diffusion of water across a partially permeable membrane, from a solution with a high water potential to one with a low water potential

Question 8

what is active transport?

Answer 8

the uptake of particles by cells against a concentration gradient

Question 9

what does active transport require?

Answer 9

energy