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Study Guide Audio

Hi Everyone!!! Click the link above to listen to a study guide covering the cell, tissues, integument, and skeletal tissues material.

Comment on this page with any questions related to the material.

Trevor

17 comments on “Study Guide Audio

  1. clayton vance
    October 20, 2013

    Well this is awesome. Wish i would have came here before creating my notes. lol.

  2. chris f
    October 20, 2013

    Hi Dr. Lohman,

    Thanks so much for this. The ion that is primarily involved in maintaining membrane potential is K+, correct? Because its passes more easily through the plasma membrane?

    • clayton vance
      October 20, 2013

      i am in total agreement with you concerning K+. So, where two are in agreement…….

  3. chris f
    October 20, 2013

    Also, I had in my notes that tendons attach to bones on periosteum but that they attach to the perforating or “Sharpey’s” fibers, did I have that right?

  4. tlohman2
    October 20, 2013

    Hi Chris and Clayton,

    Yes K+ or potassium is the ion most responsible for establishing membrane potential. Regarding your periosteum question…. Whether tendons attach to the periosteum or the sharpey’s fibers is a subtlety I wasn’t intending on addressing. For the purposes of this test, tendons attach to the fibrous periosteum, which is anchored down to the bone by sharpey’s (perforating) fibers.

    Does that clear that up? Tendons attach to the periosteum… not directly to the compact bone.

    Let me know if you have more questions…

    Trevor

  5. chris f
    October 20, 2013

    That does help, thanks!

  6. chris f
    October 20, 2013

    You mentioned at about 13:15 that melanin/DNA are chemical barriers, but I thought DNA was technically considered a biological barrier since it’s alive?

    • clayton vance
      October 20, 2013

      According to the book, melanin “provides” a chemical barrier, a massive polymer, and DNA a biological barrier. pages 162-163

    • tlohman2
      October 20, 2013

      Oooops my mistake. Doesnt change anything regarding the test question but yes you are correct. Melanin = Chemical barrier, DNA = biological barrier

  7. Pam U.
    October 20, 2013

    Hi! Quick question:
    where are ribosomal subunits produced? Is it in the rough ER?

    • tlohman2
      October 20, 2013

      Ribosomal subunits are produced by the nucleoli inside of the nucleus. They are combined in the cytoplasm to form functional ribosomes… Some of which are bound to the Rough ER.

      Does that help?

      Trevor

      • Pam U.
        October 20, 2013

        Yes!! Thank you!!

  8. clayton vance
    October 21, 2013

    Hey doc,

    quick question: Which type of cells would contain well developed Golgi apparatus/endoplasmic reticulum??

    ANS. cells of the pancreas?

    • clayton vance
      October 21, 2013

      ANS. secretory cells?

    • chris f
      October 21, 2013

      I’m guessing they are one in the same? Since anything shipping out proteins would need to have the synthesis center (ER) and the shipping center (Golgi). Maybe stuff like the lungs that secrete mucous?

      • clayton vance
        October 21, 2013

        yes they are. i felt a broader answer would be more sufficient.

  9. tlohman2
    October 21, 2013

    Guys you are absolutely correct in everything you’ve said here. The very broad answer would be that the more protein a cell secretes the larger and more highly developed its golgi apparatus and Rough endoplasmic reticulum will be. So yes you are right in your previous assumptions….The islet cells of the pancreas that secrete insulin, the goblet cells that secrete mucin, and all secretory cells in general will have a highly developed golgi apparatus and endoplasmic reticulum.

    Trevor

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This entry was posted on October 19, 2013 by in A & P Study Guides.
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