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Quiz 02 Study guide: Tissues

What are the human body’s levels of organization?

What are the primary roles of epithelial tissue?

What are the structural properties of the different connecetive tissue fibers? which one has the highest tensile strength? which one forms a dense supportive web? Which one can deform and then recoil easily?

General composition of the tissues. Are they made mostly of cells? do some have large quantities of extracellular matrix, and what is this matrix composed of?

What is the primary cell type of the different connective tissues?

What are some of the additional properties of areolar connective tissue? (Fluid/nutrient resevoir, etc)

What is the primary structural difference between dense regular and dense irregular connective tissue? (hint: its in the name)

What roles would stratified squamos epithelium be best suited for?

Where are the keratinized/non keratined versions of stratified squamos epithelium?

General properties of pseudostraified epithelium

What does the basement membrane consist of?

Where might you expect to find dense regular and irregular connective tissues

What property of hyaline cartilage makes it resistant to compression?

Skeletal muscle properties versus cardiac muscle properties

What is the most widespread tissue in the body

What are the two specialized forms of covering/lining epithelia that have their own special names? (hint: theyre written on one of the PPT slides)

What are the common characteristics that connective tissues share

What produces the basal lamina?

Alright guys there it is! Study guide 2. Let me know if you have any questions about what I meant by any of the following.

Trevor

6 comments on “Quiz 02 Study guide: Tissues

  1. Chris Firek
    October 3, 2013

    Hi Dr. Lohman,

    Would you be able to expand a little bit on the purpose and examples of the non-keratinized stratified squamous epithelim (say that five times fast) – you mentioned in lecture that anything “entering” your body will be characterized as this, but not areas such as the stomach which is technically considered “outside” the body.

    So some examples would be inside the mouth, esophagus, etc – could you clarify what not having the keratin on the surface of this tissue type does exactly for the body?

    Thanks

    • tlohman2
      October 3, 2013

      I can!

      I think…

      I can see how some of my word choices could’ve been confusing

      So yes, our outer layer of skin is made up of a keratinized version of stratified squamos epithelium. You can envision that the “skin” lining our mouth is continuous with the skin lining our face, neck arms etc right? So it is really one large stratified epithelial sheet that transforms from keratinized stratified squamous epithelia to non keratinized stratified squamos epithelia when it enters any of the body’s openings. In the case of the mouth this non keratinized tissue lines the interior of the mouth and down the interior of the esophagus until the stomach. Which is lined by simple columnar epithelia.

      So, the outer layer of our skin exposed to the exterior environment (not the interior of our hollow cavities, even though this is still technically “outside” of the body) is keratinized, and the skin lining the interior of the mouth, esophagus, and other body openings is non-keratinized.

      (Side note, there is some regions of keratinized epithelia in the mouth as well, but for testing purposes just stick with what we’ve learned so far.)

      Why is this important? Great question, we will learn a lot more about why a keratinized skin surface is very important when we get to the integumentary system.

      Now, I am not an expert in oral mucosa but I’ll give you my best guess at why we see this variation between the tissue lining body openings, and the tissue covering the skin.

      Remember when I told you guys that in anatomy and physiology, structure = function. This phrase essentially explains every structural variation we see in the body. All we have to do is ask ourselves what is the function of our skin, and how is it different from the function of the tissue that lines our mouth?

      Well, our skin acts as a barrier. It keeps out chemicals and invaders, it keeps in water, and it provides a tough strong barrier against injury. The mucosa (non-keratinized stratified squamos epithelium) of our mouth has a different function. It absorbs things, secretes things, stays constantly moist, etc. In very simple terms the function of our skin is to be impermeable, and the function of our oral mucosa is to be permeable.

      Basically, keratinization makes the skin cells tougher, they fill with protein, plasma membranes thicken, and in the process a relatively non-permeable membrane is formed (perfect for the function of skin!).

      Make sense? ask again if it doesn’t, I’ll try one more time.

      Trevor

  2. Chris Firek
    October 3, 2013

    Me again – could you please also clarify what a “joint capsule” is (in referring to dense irregular connective tissue) – can’t really get my head around it

    Thanks

    • tlohman2
      October 3, 2013

      The joint capsule is a fibrous connective tissue sheath that covers the articulating partners of a joint. Our joints are filled with fluid, this capsule holds the fluid within the joint, and adds some structural support. We’ll see this much more clearly soon in lab.

      Trevor

  3. chris f
    October 5, 2013

    Thanks this helped a lot

  4. Pingback: The Cell, Tissues, Integumentary system, and Skeletal Tissues Study Guide | A & P Source

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This entry was posted on October 2, 2013 by in A & P Study Guides.
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