Cell Transport

Question 1

Name an example of osmosis in plants

Answer 1

water moving from soil to root hair cell

Question 2

definition of osmosis

Answer 2

diffusion of water from a dilute solution to a concentrated solution through a partially-permeable membrane

Question 3

how are fish gills adapted for efficient gas exchange

Answer 3

-large surface area
-thin layer of cells
-good blood supply

Question 4

how are the lungs adapted for efficient gas exchange

Answer 4

-alveoli (large surface area)
-one cell thick membranes
-moist membrane
-good blood supply

Question 5

how are villi (in the small intestine) adapted for exchanging substances

Answer 5

-long + thin (high surface area)
-one cell thick (short diffusion pathway)
-good blood supply, network of capillaries (maintains steep concentration gradient)

Question 6

3 factors that affect the rate of diffusion

Answer 6

-temperature
-surface area of membrane
-concentration gradient

Question 7

definition of diffusion

Answer 7

net movement of particles from area of high to low concentration along concentration gradient
-passive process