Health Blog!

Welcome students to our class blog. We will be using this space for class discussions to examine, evaluate, and share knowledge. Discussions provide opportunities for students to think critically on the topics we will be learning about in Health class. Concepts, assignments, and readings will be used as the basis for our discussions to create a positive learning community in which students are willing to share their ideas and to accept constructive criticism from their peers.

Monday, January 3, 2011

Concept check 27.5

Please read section 27.5 of the online Biology book on muscles. Take notes of the reading in your Health notebook. Post your answers to concept check 27.5 on the blog and provide constructive feedback to three other learners. Constructive feedback not only means you may agree with someone else's answers or ideas but as well how those ideas may open the doors to new learning opportunities.  Due date: Jan. 10, 2011

Concept check 27.5
1. Explain how muscles work in pairs in moving limbs.
2. Identify the structures that make up a skeletal muscle. Include these terms: muscle fiber, fascicle, myofibrils, actin, myosin, sarcomere.
3. Identify at least 3 organ systems involved in a handshake. Describe WHAT each system contributes to the handshake.
4. Explain how actin and myosin interact as a muscle cell contracts.
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2 comments:

  1. emii alarconJanuary 8, 2011 at 9:32 AM

    Gaby i dont know how to post the activity i just know how to post comments but there is no place where it says post can you help me please thanks

    ReplyDelete
  2. emii alarconJanuary 9, 2011 at 7:37 AM

    Posted by: Emii Alarcon

    1.When a muscle contracts, the opposite muscles relaxes which makes this a pair work.

    2.Muscle fiber: a long muscle that contains nuclei.

    Myofibrils: it is inside a muscle fiber made up of smaller units that contract.

    Sarcomere: unit of contraction in a muscle fiber.

    Actin: The thin filament of sarcomere made of protein.
    Myosin: The thick filament of a sarcomere made of protein with bump- like projections. called myosin heads.


    3. The first thing is how your brain initiates the handshaking.
    Your eyes meet the other person and the action begins.
    Then contraction and relaxation your back, shoulder, upper arm, forearm, and wrist are also involved.The muscles manipulate the 27 bones in your hand into place.


    4. Myosin heads are attached to thin filaments, then bend and pull these filaments in sacromere. ATP releases myosin head from thin filament. Both actin and myosin make up the muscle filaments of protein.

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