Types of transport

Question 1

name me three types of passive transport

Answer 1

1. diffusion 2.osmosis 3.faciliated diffusion

Question 2

name me two types of active transport

Answer 2

1. pumps 2. bulk transport

Question 3

what is the definition of diffusion

Answer 3

diffusion is the net movement of molecules from a region of higher concentration to a region of lower concentration that is down the concentration gradient.

Question 4

why do molecules diffuse

Answer 4

to obtain equilibrium

Question 5

how does diffusion apply in cell membrane

Answer 5

hydrophobic molecules, and small non-polar molecules are able to diffuse through the lipid bilayer of plasma membrane. but ions and large polar molecules cannot

Question 6

name the 4 factors that could affect the rate of diffusion

Answer 6

1. concentration gradient. 2. temperature 3. type of diffusing molecule 4. medium of diffusion

Question 7

definition of osmosis

Answer 7

osmosis is the net movement of water molecules from a solution of higher water potential to a solution of lower water potential that is through a semi-
permeable membrane

Question 8

distilled water is

Answer 8

higher in water potential

Question 9

dilute water is

Answer 9

higher in water potential

Question 10

the concentrated salt solution is

Answer 10

lower in water potential

Question 11

sucrose solution is

Answer 11

lower in water potential

Question 12

Hypotonic solution is

Answer 12

higher in water potential (less solute, more water)

Question 13

Hypertonic solution is

Answer 13

lower in water potential (more solute, less water)

Question 14

isotonic solution

Answer 14

no net movement of water, solute concentration is the same on both sides of the cell

Question 15

animal cell (no cell wall) immersed in a hypotonic solution, what would happen?

Answer 15

Due to osmosis, the cell would gain water, swell, and possibly burst.

Question 16

animal cell (no cell wall) immersed in a hypertonic solution, what would happen?

Answer 16

due to osmosis, cell would lose water, shrivel and shrink and possibly die.

Question 17

plant cell (cell wall) immersed in hypertonic solution what would happen

Answer 17

due to osmosis, the cell loses water, the cell body shrinks, the membrane pulls away from the cell wall, and the cell is plasmolyzed. (plasmolysis).

Question 18

plant cell (cell wall) immersed in hypotonic solution what would happen

Answer 18

due to osmosis, the cell gains water but generally still retains the same shape due to the cell wall

Question 19

plant cell (cell wall) immersed in the isotonic solution what would happen

Answer 19

no net movement of water, the cells volume remain constant.