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Re: Anatomy B/C

Posted: February 18th, 2012, 10:46 am
by butter side up
Does anyone know exactly what we need to know for GFR calculation? Does anyone know how to calculate GFR?
GFR [glomerular filtration rate] is the rate at which the glomerulus filters solutes and water from the blood. It is usually expressed as volume per time, most often mL/min. It is measured by measuring the amount of a solute that is freely filtered, and neither reabsorbed nor secreted in both the urine and the blood stream. If the GFR is low, it can be a sign of renal failure.

It is calculated by GFR= (urine concentration x urine flow)/ plasma concentration.
The urine flow is the volume of urine collected over time.

It can also be measured using radioactive isotopes or inulin. [NOT insulin!] However, the typical method is using the creatinine clearance, which uses creatinine for the solute. Due to the fact that it is minimally secreted, this can result in an overestimation of 10-20%, but considering the ease of this procedure, it is considered acceptable. Typically, the urine is collected for 24 hours to determine the amount of creatinine removed from the blood over that time.

I don't know how much of this you may need beyond a basic understanding, as I have seen some tests that were fairly basic and some that were ridiculously in-depth with the questions on physiology, but I hope this helps!
Alternatively, you can consider that if one removes 1440 mg in 24 hours, that is equal to 1 mg/minute. If the blood concentration is 0.01 mg/mL, then 100 mL/min of blood is being cleared, since, to get 1 mg of creatinine, 100 mL of blood containing 0.01 mg/mL would need to have been cleared.

Re: Anatomy B/C

Posted: February 21st, 2012, 9:25 am
by AzureWotan
Hey, this is my final event. Im all alone, and I havent started my notes yet. Any tips?
Like what should go on the notes, what to memorize, etc

Re: Anatomy B/C

Posted: February 21st, 2012, 10:46 am
by foreverphysics
To be honest, you should have started studying long before now. But let’s forget about that for a second and focus on what you need to do. Since I’m in Div B, I can’t tell you anything about the excretory system; however, that closely follows the digestive system, so that shouldn’t be too big of an issue.
For the respiratory, know the path of airflow, the different kinds of breathing, the histology of…well, everything, capillary diffusion, pulmonary pressures, the gas laws, the muscles that control breathing…etc., etc.
For the digestive, know the GI tract, the histology, the layers of muscle, the different hormones and chemicals, what cells secrete what which cause what other cells to secrete what that triggers what, chloride shift…
Just, you know, get a textbook and read through the systems. Yes, all of it. And take notes. Then make your sheet. Also, when your competition is decides for you how much time you get on all this.

Re: Anatomy B/C

Posted: February 21st, 2012, 3:35 pm
by rkoopma2
Hey, this is my final event. I'm all alone, and I haven't started my notes yet. Any tips?
Like what should go on the notes, what to memorize, etc
For the Excretory system you should know the anatomy of the kidneys, ureters, bladder, and urethra, parts and function of the nephrons. Steps of urine formation. plus the diseases and disorders on the rules.
Also, when your competition is decides for you how much time you get on all this.
Michigan regionals aren't until mid-march or later, so you'll have some time.

Re: Anatomy B/C

Posted: February 21st, 2012, 7:18 pm
by SciBomb97
Hey, this is my final event. I'm all alone, and I haven't started my notes yet. Any tips?
Like what should go on the notes, what to memorize, etc
For the Excretory system you should know the anatomy of the kidneys, ureters, bladder, and urethra, parts and function of the nephrons. Steps of urine formation. plus the diseases and disorders on the rules.
Also, when your competition is decides for you how much time you get on all this.
Michigan regionals aren't until mid-march or later, so you'll have some time.
That is still going to be a very humongous handful of things to study, assuming that you're looking to do well. Good luck! :D

Re: Anatomy B/C

Posted: February 22nd, 2012, 9:36 am
by AzureWotan
This is my first year doing it, How do you guys balance 3-6 events >.<

Re: Anatomy B/C

Posted: February 22nd, 2012, 12:21 pm
by foreverphysics
It's not too bad. If you're me, you balance about 8 events, and then go worry about doing assessments for SO in general. ;)
Anatomy does require a lot of work and memorization, though.

Re: Anatomy B/C

Posted: February 23rd, 2012, 9:22 am
by AzureWotan
It's not too bad. If you're me, you balance about 8 events, and then go worry about doing assessments for SO in general. ;)
Anatomy does require a lot of work and memorization, though.
Teach me your ways master....

Re: Anatomy B/C

Posted: February 23rd, 2012, 11:36 am
by wobanumous
I need help on making a cheat sheet for anatomy. Do yall have any tips on what I should put on my cheat sheet like the diseases, functions, measurements, etc?

Re: Anatomy B/C

Posted: February 23rd, 2012, 11:49 am
by foreverphysics
A cheat sheet is for you to put whatever you don't know on there. So whatever you don't know, put on there. No one can make your cheat sheet for you; you have to do it yourself.