Anatomy Summer 2006 Club

aHolisticStudent · Jun 26, 2006

According to my text, PTH is released from the parathyroid glands in response to low levels of calcium ions in the blood. It says that PTH has 3 major effects:
1) Stimulate osteoclast activity
2) Increase rate of intestinal absorption of calcium ions and enhances the affects of calcitriol.
3) Decreases rate of excretion of calcium ions
Does this jive with what your text says? I'm using Martini's 7th Edition. UGH! I can't believe I already forgot this. I had the exam on it about 3 weeks ago and I already forgot it. Had to look it up.

Multicollinarity,

Thanks for the reply! Yes, my text says the same. My question was pertaining to point "2) Increase rate of intestinal absorption..." which is what Vitamin D does after the PTH promotes the formation of vitamin D in the kidneys.

I just didn't understand why the kidneys are handling this aspect. Is it b/c Vitamin D is only formed in the kidneys or is it because the kidneys are already responding to the PTH by increasing the reabsorption of Calcium ions rather than excreting them and the body is trying to "kill two birds with one stone" or is there is some other reason behind the kidneys being responsible for the Vitamin D formation.

I appreciate you taking the time to look it back up, sorry to hear I'm going to have so much info. in this class that I may also forget this subject in a few weeks :).

And regarding the textbook, I'm using Seeley, 7th edition.

By the way, where did you come up with your handle and what does it signify? It's very unique.

Multicollinearity, BSN, RN · Jun 26, 2006

Multicollinarity,
Thanks for the reply! Yes, my text says the same. My question was pertaining to point "2) Increase rate of intestinal absorption..." which is what Vitamin D does after the PTH promotes the formation of vitamin D in the kidneys.
I just didn't understand why the kidneys are handling this aspect. Is it b/c Vitamin D is only formed in the kidneys or is it because the kidneys are already responding to the PTH by increasing the reabsorption of Calcium ions rather than excreting them and the body is trying to "kill two birds with one stone" or is there is some other reason behind the kidneys being responsible for the Vitamin D formation.
I appreciate you taking the time to look it back up, sorry to hear I'm going to have so much info. in this class that I may also forget this subject in a few weeks :).
And regarding the textbook, I'm using Seeley, 7th edition.
By the way, where did you come up with your handle and what does it signify? It's very unique.

Wow, your text sounds more in depth on this aspect. Mine mentioned nothing regarding Vit D and kidneys. So I don't know.

Thank you for asking about my forum name! I chose it on a whim when I registered. It is a statistics term. I spelled it wrong though, LOL.

Dictionary definition:

multicollinearity

n : a case of multiple regression in which the predictor variables are themselves highly correlated

The word kind of hangs in my head because it's about how complex causes and predictor variables can be - so much so that they are tied up so to speak. Anyway, I like it because it makes me think of the astonishing complexity to life and that little is black and white.

Sorry I couldn't be of help re: your question.

JaxiaKiley · Jun 26, 2006

Yikes, reading this is starting to make me nervous about my Summer II A&P class. Good luck everyone!

Faeriewand, ASN, RN · Jun 26, 2006

I am taking A&P 2 and we just started on the third week. It is a six week class. (Thought I had already posted to this thread but guess not) I just aced my first lab exam! Woot! I will be happy to get a B in this class. It is pretty tough because the teacher cuts you no slack at all. We took our lecture exam today and I guess I didn't read all the directions becaues the other students said that the questions could have more than one answer. What?!? I didn't know that! :uhoh3: Dang it. Well I don't know how I did but I know I at least passed the test so that's all that matters :)

Good luck to everyone taking Anatomy this summer! How are you all doing in the class by the way?:heartbeat

emtb2rn, BSN, RN, EMT-B · Jun 26, 2006

I am taking A&P 2 and we just started on the third week. It is a six week class. (Thought I had already posted to this thread but guess not) I just aced my first lab exam! Woot! I will be happy to get a B in this class. It is pretty tough because the teacher cuts you no slack at all. We took our lecture exam today and I guess I didn't read all the directions becaues the other students said that the questions could have more than one answer. What?!? I didn't know that! Dang it. Well I don't know how I did but I know I at least passed the test so that's all that matters :)
Good luck to everyone taking Anatomy this summer! How are you all doing in the class by the way?:heartbeat

I'm finishing up w/a 6 week A&P II class this Thursday. My professor calculates your grade based on accumulated points. With 2 tests to go (tomorrow and Thursday), I have enough points to get a C even if I skip these last 2 tests. I want an A so I'll take 'em.

The other interesting thing about this instructor is he doesn't like multiple choice tests. Instead he gives fill in the blank questions like "What role do platelets have in the blood clotting process?" and "What role does the hypophyseal portal system play in the function of the anterior pituitary gland?" Either ya know it or ya don't. There are some folks getting absolutely crushed in this class.

Multicollinearity, BSN, RN · Jun 26, 2006

For those who are about to take A&P and are concerned, here's what I recommend. Allow extra time for any chapters that study tissues. For example, bone tissue, muscle tissue, and nerve tissue. Also allow a bit of exra time for learning the muscles.

I have a 97% so far, and I'm 2/3 done. I first read the chapter SLOOOOWLY just to get accustomed to the subjects and concepts without trying to remember. Then I go thru and make highlights on the major points. Then I re-read the chapter concentrating on actually remembering and I make an outline of the chapter, and write notes on it. I then go thru all the exercises for my text's website. After that I answer all of the questions in the text, and the chapter review. If I am memorizing bones or muscles or nerves I get out my coloring book and color away, committing to memory each item. I then go back to the text website and take practice exams. Any that I miss, I write out several times, with the correct answers. I re-study my notes (NOT THE BOOK) again and again. I quiz myself on the major points. I then retake the practice exams on the website until I score 98-100%. Then I am ready for the real exam. Allow many many hours of study for this class. Also, I'm taking my class by internet, so I have no instructor (really) and no lecture.

Faeriewand, ASN, RN · Jun 26, 2006

Hmmmm my teacher gave us study questions to use as a guide. This would be a good place to post some of those questions that stump me. A few really stumped me last time but I think I did ok on the lecture test. I feel as though I passed which is what I need. What I want is an A or a B so that's what I"m shooting for. :) I would love to talk Anatomy with anyone here!

cad4296 · Jun 27, 2006

Multicollinarity,
Thanks for the reply! Yes, my text says the same. My question was pertaining to point "2) Increase rate of intestinal absorption..." which is what Vitamin D does after the PTH promotes the formation of vitamin D in the kidneys.
I just didn't understand why the kidneys are handling this aspect. Is it b/c Vitamin D is only formed in the kidneys or is it because the kidneys are already responding to the PTH by increasing the reabsorption of Calcium ions rather than excreting them and the body is trying to "kill two birds with one stone" or is there is some other reason behind the kidneys being responsible for the Vitamin D formation.
I appreciate you taking the time to look it back up, sorry to hear I'm going to have so much info. in this class that I may also forget this subject in a few weeks :).
And regarding the textbook, I'm using Seeley, 7th edition.
By the way, where did you come up with your handle and what does it signify? It's very unique.

I learned from nutrition that Vitamin D is also produced from sunlight. It is manufacturered from sunshine using the choloesterol from your body. It is also attained from foods, so in regards to your question I don't believe it has to do with being "only formed in the kidneys". I may not be explaining this correctly so bear with me. But I believe it has more to do with the hormone secreted. PTH is stimulated by low blood and clacium levels (note that vitamin D also regulates the absorbtion and use of calcium) The target cells for PTH is the skeleton, kidneys and intestines to promote osteoclast activity and calcium reabsorbtion. Vitamin D also stimulates intestinal absorbtion and reabsorbtion in the kidneys along with maintaining blood calcium and phosphorus levels. So I believe the reasoning behind the kidneys handling this function has to do with the hormones secreted to target cells, absorbtion function the kidneys take, and probably the electrolyte balance that has to do with the Calcium and phosphorus elements. Could be way off, but that's my understanding of it.

aHolisticStudent · Jun 28, 2006

I learned from nutrition that Vitamin D is also produced from sunlight. It is manufacturered from sunshine using the choloesterol from your body. It is also attained from foods, so in regards to your question I don't believe it has to do with being "only formed in the kidneys"...I believe it has more to do with the hormone secreted. PTH is stimulated by low blood clacium levels (note that vitamin D also regulates the absorbtion and use of calcium) The target cells for PTH is the skeleton, kidneys and intestines to promote osteoclast activity and calcium reabsorbtion. Vitamin D also stimulates intestinal absorbtion and reabsorbtion in the kidneys along with maintaining blood calcium and phosphorus levels. So I believe the reasoning behind the kidneys handling this function has to do with the hormones secreted to target cells, absorbtion function the kidneys take, and probably the electrolyte balance that has to do with the Calcium and phosphorus elements.

Thanks for the response. For the most part I agree with you. Here is what I have discovered: Yes, sunlight does help to create Vitamin D, however at this point it is in it's inactive form. The vitamin D must then go through a two step process in the liver and finally the kidneys that alters it, thereby making it active Vitamin D. Once in its active form it is able to promote an increase in the absorption of calcium through the intestine. So, the kidney's upon receiving the PTH both decrease the amount of Calcium ions excreted as well as completes the transformation of Vitamin D from inactive to active status and thereby drives the small intestine to allow more calcium ions to enter the blood.

Thanks to everyone who took the time to provide some insight into blood calcium homeostasis I'm very grateful!

Faeriewand, ASN, RN · Jun 30, 2006

I got another A! I got a 95 on my lab and now a 90 on the lecture test. I didn't do this well in A&P1 so I"m surprised! We've started on the respiratory system which looks harder so I hope I can maintain that A! :)

Hehe I just wrote all about it in my journal. Everyone thinks I"m the class brainiac now LOL!

Multicollinearity, BSN, RN · Jun 30, 2006

I got another A! I got a 95 on my lab and now a 90 on the lecture test. I didn't do this well in A&P1 so I"m surprised! We've started on the respiratory system which looks harder so I hope I can maintain that A! :)
Hehe I just wrote all about it in my journal. Everyone thinks I"m the class brainiac now LOL!

Good for you!:balloons:

Are you all as tired as I am? I swer I could go into a coma when this class is done.

TeeRN2Be · Jul 1, 2006

I am taking A&P 1 this summer during the second summer session starting July 11-Aug 10. I must admit I am a little scared and anxious because I wor FT and have 3 small children....I can do it with a lot of prayer!!!