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Cell membrane transport processes - Diffusion

Cell membrane transport processes - Diffusion

Author: Kelsey Perreault
  1. This packet should help a learner seeking to understand the importance and nature of diffusion as a transport process within biological molecules.

  2. Provide real world examples, with opportunities to diagram/construct or label a cell membrane.

  3. Develop the packet in such a way the learner can identify patterns and how they lead to the objective of the packet.

  4. Explain or reinforce how the structure enables the function.

  5. Introduce the new vocabulary and definitions, reiterating them throughout the lesson.

  6.  Keep to the basic information and design activities for practice with the new content material.

  7. Develop some means of assessment to assure understanding of  the concepts, with correct responses and discussion after the activity.

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This video explains how diffusion works. It shows the concentration gradient that diffusion follows, explains the difference between diffusion and facilitated diffusion, and gives real life examples.

Source: Self Created by Kelsey Perreault

Review Question

Answer the following question about diffusion. When you are finished, play the video below for the answer.



1. Moths emit chemicals called pheromones to attract a mate.


a) Which process is responsible for the distribution of these chemicals through the air?


B) If a moth detects pheromones, how might it work out which direction they are coming from?


c)What would be the advantage of a moth releasing the pheromones on a night when there was little wind?

Answer for Review Question