Transport In Cells

Question 1

What is diffusion?

Answer 1

Movement of partials from a area of higher to low concentration

Question 2

What’s the rate of diffusion?

Answer 2

Speed of which diffusion occors

Question 3

What are the three things which affect the rate of diffusion?

Answer 3

1- surface area
2- concentration gradient
3- temperature

Question 4

What are single celled organisms

Answer 4

They are organisms only made up of 1 cell (very small)

Question 5

What are Multicellular organisms

Answer 5

Organisms with a high amount of cells( humans, plants, animals)

Question 6

What are organisms

Answer 6

A living thing which can react to stimuli , reproduce and grow.
examples - fungi , bacteria are all organisms

Question 7

How are the lungs adapted for gas exchange ?

Answer 7

Moist walls - gases dissolve in the moisture helping them to pass across the gas exchange surface. Permeable walls - allow gases to pass through. Extensive blood supply - ensuring oxygen rich blood is taken away from the lungs and carbon dioxide rich blood is taken to the lungs.

Question 8

How is the small intestine adapted for absorption of food into the blood

Answer 8

Small intestine if folded inwards to have a large surface area
Blood supply flows quickly through to maintain concentration gradient

Question 9

How are gills In fish adapted to gas exchange

Answer 9

Large surface area

Transport system to maintain concentration gradient

Question 10

What’s gas exchange

Answer 10

Gas exchange is the physical process by which gases move passively by diffusion across a surface.

Question 11

What’s osmosis

Answer 11

The movement of water molecules from a high to a low concentration through a partially permeable membrane