Tuesday, 25 September 2012

Video Homework.

This is the video we started in class today. The content isn't all vital for the course we're on but it is interesting.  From the first 20 minutes, see if you can write down three things that Bacteria need to survive and reproduce.  Bring this in for an achievement point. 

Wednesday, 19 September 2012

Vaccinations

Answer the following questions on vaccinations:
  1. What do white blood cells do to pathogens? (Use the term from the link).
  2. From the link above, what are toxins and anti toxins made from?
  3. Watch this animation, and explain HOW a vaccine keeps us from getting the certain disease again.
  4. Use this link to say whether viruses or bacteria are smaller. What size is a rhinovirus?
  5. What are special about the pathogens in this needle? (Assuming the boy is being vaccinated!)
  6. Describe the difference between specific and non-specific immunity, using examples from the body outlines we put in your books two lessons ago (If you've already done this for homework you can skip it now).
  7. If you have been immunised against 5 different diseases, what is the minimum number of antiodies that would currently be in your blood? (If you know you've had a different number, use that instead).
  8. Extension - Read this article about malaria, and summarize the problems associated with developing vaccines.
  9. Play the activity here. What issues are there for the white blood cells in finding the pathogens?
  10. Finally, try this activity and think about how the pathogen (you!) is being transferred from person to person, or country to country.

    Tuesday, 18 September 2012

    Immune system intro and homework

    This video is for your homework this week, as well as asking what vaccinations you've had. We'll be covering this in the next few lessons, so don't worry if you don't understand everything yet.

    For an achievement point, explain the difference between specific and non-specific responses in the immune system.  bring this in to be marked on Thursday (double lesson).

    Wednesday, 5 September 2012

    Healthy Diet

    Today we're going to start looking at what our bodies need to work efficiently and how they get these things from food.  To start with, have a read through the information here and try the test questions at the end.
    Once you've finished those, either find your own information or use the links to answer the following questions:
    1. Define the word metabolism.
    2. Explain why pregnant women usually need to eat differently to women who aren't pregnant.  What benefits does this have for both the mother and baby? 
    3. Find out what percentage of the energy in the food you eat each day is used for growth, and what process uses the most energy.
    4. Why do we need to eat food?
    5. Watch the video on the right.  What food groups is Homer consuming too much of? What is he not getting enough of?  
    6. What are two things he could do in order to lose weight?


    7. Why do we need each of the food groups in the pyramid here?
    8. For each major food group, explain why it is needed and what can happen if we have too much or too little of it.

    When you've finished, try this link - http://www.purposegames.com/game/microbial-metabolism-quiz