Diffusion, osmosis and active transport

?
  • Created by: Emma
  • Created on: 07-05-13 16:44

1. How are exchange surfaces adapted?

  • Thin - short distance to diffuse, large SA - lots of substances can diffuse at once, blood vessels in animal and ventilation - things can get in and out of blood fast and air can move in and out
  • Thick with a small surface area so lots of substances can pass through and good ventilation and lots of blood vessels in humans and animals
1 of 8

Other questions in this quiz

2. What can substances move by?

  • Active transport
  • Diffusion, osmosis and active transport
  • Diffusion and osmosis

3. What is diffusion?

  • It is the movement of particles from an area of high concentration to an area of low concentration
  • It is the movement of particles from an area of low concentration to an area of high concentration

4. What is osmosis?

  • The movement of water molecule through a partially permeable membrane from an area of high concentration to an area of low concentration
  • The movement of water molecule through a partially permeable membrane from an area of low concentration to an area of high concentration

5. What happens when an organism is bigger and more complex?

  • Exchanging substances become more difficult as where the substances are needed or where waste is made, it is further from the exchange surface
  • Exchanging substances becomes easier as the waste and where the substances are needed is closer to the exchange surface
View more questions

Comments

sghdgfhn

Report

Unfortunately my final score didn't load.... :(

Similar Biology resources:

See all Biology resources »See all Respiration and exercise resources »