Year 7: Skin, Muscle and Bones

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Over the past few weeks we have been learning about the cells, tissues and organs within the skin, skeletal and muscular systems. I would like you to create your own quiz to test others about what they have learnt. First write ten questions – either true/false or multiple choice – about skin, muscles or bones. You can then use Quiz Revolution to create a multiple choice quiz with ten questions, or use Classtools Arcade Game Generator to create a question and answer or true/false style interactive quiz. You can use creative commons images to add to the Quiz Revolution quizzes. Both these types of quizzes can be embedded in your blogs – get the embed code and paste into the HTML section of your blog post page. Then send an email to me with a link to your blog, showing me the quiz you have created.

Alternatively, create a paper or Freemind mindmap showing the relationships between these three systems and what they are made up of. For example, “Skin is made up of cells and protects the internal organs from damage and infection.”

I have also set a learning task for you on the Ultranet – go to the school page and click on the Ultranet, log in (I have a copy of your username and a new password if you have forgotten) and then go to the Learning Tasks page. The task is about bones and muscles.

Year 7 – Skin, Bone, Muscle and Nerves

reaction_time_test

Your body consists of different systems that work together to provide nutrients, remove wastes, allow you to move, grow and reproduce. This term we will be studying the skeletal, muscular and nervous systems as well as the skin. These systems consist of organs, which are made up of tissues, which are comprised of cells.

The “Cell Theory” states that:
“Cells” are the smallest unit of life.
All living organisms are composed of cells and their products
All cells arise from pre-exisiting cells.

These cells are made up of organelles (nuclei, mitochondria, chloroplasts, golgi complexes, ribosmoes etc.). Organelles are made up of compounds (molecules) which consist of atoms. Atoms are known as the smallest indivisible particles.

So skin is made up of specific types of cells, different to muscle cells, bone cells and nerve cells. These different types of cells are different sizes and shapes and contain different nunmbers of organelles (a red blood cell has no nucleus for example) because they perform different functions within the body. Draw up a table in your workbook (or on your netbook) with the four different systems and describe their structure (what they look like) and function (how they work). Draw an example of the four different cell types in these systems. Use your textbook and research using the internet to complete your table.

Your first experiment will be about the nervous system – “How Quickly can you Respond to a Stimulus?”. Draw up the table in your books (or your netbook) and record your results from the experiment described on page 285. Compare your average in your writing hand with your non-writing hand. Then use your mobile phone to send a text message or play a game on your ipod while doing the same test.
What do you notice about the results?
What does this suggest to you about using a phone or ipod while driving?
Then try the same type of test at “The Online Reaction Time Test” page. See if you can beat my average reaction time of 0.273 seconds! Let me know in the comments section what your average reaction time for each experiment was.