Anatomy B/C

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Re: Anatomy B/C

Postby 49ers » February 27th, 2012, 5:22 pm

Does anyone have some information on the chemical breakdown of proteins and fats?
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Re: Anatomy B/C

Postby SciBomb97 » February 27th, 2012, 6:53 pm

Does anyone have some information on the chemical breakdown of proteins and fats?
Proteins are broken down mainly by pepsin (produced as pepsinogen by the parietal cells of the stomach and activated by HCl) and some pancreatic enzymes like trypsin, chymotrypsin, and carboxypeptidase.
Before fats are digested, they are first emulsified by bile in the small intestine. The bile (or rather, the bile salts in the bile) aggregate the fats into small digestable droplets called mycelles. Then, pancreatic lipases begin the chemical breakdown of triglycerides and fatty acids.
Hope that helps. :D
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Re: Anatomy B/C

Postby ptkid » February 27th, 2012, 7:13 pm

Does anyone have some information on the chemical breakdown of proteins and fats?
Proteins are broken down mainly by pepsin (produced as pepsinogen by the parietal cells of the stomach and activated by HCl) and some pancreatic enzymes like trypsin, chymotrypsin, and carboxypeptidase.
Before fats are digested, they are first emulsified by bile in the small intestine. The bile (or rather, the bile salts in the bile) aggregate the fats into small digestable droplets called mycelles. Then, pancreatic lipases begin the chemical breakdown of triglycerides and fatty acids.
Hope that helps. :D
isn't it micelles not mycelles...
As for the histology of the respiratory system and the digestive system does anybody have some nice websites?
Also if someone could pm me or post where which type of epithelium is located in every part of the r/d systems that woulld be nice! :D
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Re: Anatomy B/C

Postby SciBomb97 » February 27th, 2012, 7:17 pm

Does anyone have some information on the chemical breakdown of proteins and fats?
Proteins are broken down mainly by pepsin (produced as pepsinogen by the parietal cells of the stomach and activated by HCl) and some pancreatic enzymes like trypsin, chymotrypsin, and carboxypeptidase.
Before fats are digested, they are first emulsified by bile in the small intestine. The bile (or rather, the bile salts in the bile) aggregate the fats into small digestable droplets called mycelles. Then, pancreatic lipases begin the chemical breakdown of triglycerides and fatty acids.
Hope that helps. :D
isn't it micelles not mycelles...
As for the histology of the respiratory system and the digestive system does anybody have some nice websites?
Also if someone could pm me or post where which type of epithelium is located in every part of the r/d systems that woulld be nice! :D
You're right, it is micelles. Spelling is one of my least favorite things when it comes to science...

Here's the first link I found after searching google for "digestive system epithelial lining": http://www.technion.ac.il/~mdcourse/274203/lect10.html
You know, that took like twenty seconds. ;)
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Re: Anatomy B/C

Postby ptkid » February 27th, 2012, 7:21 pm

Here's the first link I found after searching google for "digestive system epithelial lining": http://www.technion.ac.il/~mdcourse/274203/lect10.html
You know, that took like twenty seconds. ;)
Thanks! I should have been less lazy. :oops:
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Re: Anatomy B/C

Postby foreverphysics » February 28th, 2012, 6:30 am

Laziness cannot be condoned in Science Olympiad.
Anyways, for respiratory system: http://www.lab.anhb.uwa.edu.au/mb140/Co ... respir.htm
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Re: Anatomy B/C

Postby KittenPsychology » February 28th, 2012, 7:18 am

Laziness cannot be condoned in Science Olympiad.
Anyways, for respiratory system: http://www.lab.anhb.uwa.edu.au/mb140/Co ... respir.htm
Oh good, this answers my question from before :D
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Re: Anatomy B/C

Postby chia » March 11th, 2012, 3:43 pm

At our regionals yesterday, the test was formatted differently than I've seen. It was separated into three packets, one for each system, each with around 42 questions (40 MC and a few free response). The respiratory system questions were actually pretty easy (several on respiratory volumes, simple anatomy), but the excretory and especially digestive system questions went way more in depth. Almost no questions on any diseases. None of the questions were unfair, I just thought it was a strange balance.
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Re: Anatomy B/C

Postby LCovington » March 12th, 2012, 5:40 pm

I went to regionals 11-February and got Eleventh, which i'm happy about (not bad for the First Year?)

The questions were pretty easy, at least to me, the only part I found hard was the part about the heart (I didn't know that the heart was part of the respiratory system, thus I had no notes on it)
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Re: Anatomy B/C

Postby chia » March 12th, 2012, 6:01 pm

Um, they're not really supposed to test on the heart - it's part of the cardiovascular system, not the respiratory. Internal respiration (gas exchange in blood vessels, transport of gases in blood) is fair game (at least at the Division C level) and maybe something about the pulmonary arteries/veins would be in the ballpark, but not the heart itself. What exactly was it asking about it?
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