Tuesday, June 2, 2009

Parathyroid Gland (Ana Physio)



The smallest Endocrine Gland.

The Parathyroid gland is located posteriorly in the surface of the thyroid gland. Usually, an individual has four to six of it, 8 being the greatest number.

Its main cells are:

a) parathyroid chief cell

b) oxyphil cell

These cells are spread through out the parathyroid gland. They are packed closely to the capillaries, which differentiates this gland from the thyroid gland.

The major role of parathyroid gland is to secrete parathyroid hormone. This hormone is the major regulator of calcium, phosphate and magnesium in the blood.

It increases the blood’s calcium and phosphate by bone resorption. As the values of calcium and magnesium increase, the PTH acts in the kidney by excreting the excess amount of Ca2+, and Mg2+ in the urine.

This process also applies to the values of HPO42-, it also decreases its concentration in the blood through excretion in the urine.

Another role of PTH is to secrete calcitriol, which is the active form of Vit. D. It is also known as 1, 25-dihydroxy vitamin D.

The role of calcitriol is to increase the absorption of calcium, magnesium and phosphate in the gastrointestinal tract.

Reference:

Principles of Human Anatomy And Physiology by Tortora & Derickson

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11 comments:

  1. zorloneJune 27, 2009 at 4:52 PM

    I would be lost if I try to answer the quiz above.

    I will come back once you have updated this post.

    Don't worry, you can do it. It takes a lot of time to research and organize your work, but it will be worth your time, I assure you.

    Someone from the net will stumble upon this post and will tell you that you helped her with her homework, wouldn't that be the best compliment you can get?

    Z

    ReplyDelete
  2. ethelJune 30, 2009 at 1:13 PM

    Hi,
    Your post is very brief, but yet full of thoughts.
    Good job!
    looking forward to your next post...=)

    ReplyDelete
  3. eryLLJune 30, 2009 at 11:39 PM

    short yet informative. nice work!

    ReplyDelete
  4. zorloneJuly 1, 2009 at 12:32 AM

    Writing posts is a bit different from writing an essay back in school. Here it is better to align the paragraphs to the left as was seen in your post.

    Suggestions:

    Try to give spaces to paragraphs and bullets to make them more readable.

    See how I made my comments? I separate different topics in paragraphs separated by spaces.

    Good luck!

    Z

    ReplyDelete
  5. eryLLJuly 4, 2009 at 8:23 PM

    you can add some hyperlinks to support your post but this post is a nice one.

    ReplyDelete
  6. juLliUsJuly 5, 2009 at 6:01 AM

    the information is complete, nicely done.

    ReplyDelete
  7. KristineKretelJuly 7, 2009 at 7:27 AM

    well explainde post.. kepp it up!

    ReplyDelete
  8. KristineKretelJuly 7, 2009 at 7:27 AM

    oopss.. typographical error..
    keep it up!

    ReplyDelete
  9. dianachristinaJuly 8, 2009 at 5:29 AM

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    ReplyDelete
  10. KellyJuly 9, 2009 at 1:50 AM

    very informative post but you can edit your font and spacing for it to become more understandable overall good job. keep it up

    ReplyDelete
  11. AubreyJuly 14, 2009 at 2:42 AM

    hi, your post is informative.. Try adding some spaces so that it will be readable..

    ReplyDelete

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