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Week 9/10 Notes

by: Sijil Patel

Week 9/10 Notes BIOL 10513

Sijil Patel

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About this Document

These notes include any information I recorded from week 9 and 10!
Introductory Biology II
Dr. Demarest
Class Notes
25 ?




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This 2 page Class Notes was uploaded by Sijil Patel on Sunday March 27, 2016. The Class Notes belongs to BIOL 10513 at Texas Christian University taught by Dr. Demarest in Spring 2016. Since its upload, it has received 21 views. For similar materials see Introductory Biology II in Biology at Texas Christian University.


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Date Created: 03/27/16
Week 9 Notes Which of these energy reserves will be used last? -muscle, protein offers the least energy bang and msucles are made of protein, they are the most important to cellular function --break down food outside cell, then bring it in -if your going to bring something into cell, then it has to be smalle -this way you could bring in larger amounts -inracellular digestion ex phagocytosis -most animals has front gut, middle gut and back gut -stomach, small intestine, and large intestine -everything in large intestine is waste -just absorbs water back out and allows waste to flow back out What mechanism moves food through the small intestine? -muscular wave contraction– paristalsis -technically in the intestines, it’s a cataltalsis instead of a peristalsis (slightly diff mechanism) along with segmentation contractions Why farts stink? -bc bacteria in the gut produce gases that stink (sulfur compounds, like with bad breath) -cecum and appendix lengths vary in different animal species What’s the deal with rabbits having their fermentation chamber after the small intestine? -It works well since they eat their pellet to recover the extra nutrients released -these pellets are not feces, they are nutrient packed cecotropes) -some hindgut fermenters like horses just live with the lower efficiency -cecum and appendix are vestigial strucutre, exhibits greats reduced in this case to the point of being negligible function -can be removed without noticeable cose to the person (lifetime risk of acute appendicitis bc blocked 7%) What will happen with this animal cell, given the solute concentrations ? (solute cannot pass through membrane) -it will shrivel up (300 vs 1000) Osmoconformers are common in the ocean, but absent in freshwater: all known freshwater animals are osmoregulators. Why? -internal solute concentrations that match that of freshwater would be too low to sustain life How can these worms afford to just dump their body fluids? -the fluids are essentially water anyway, easily replaced since the worms live in water -they can’t, that’s why they reabsorb the good molecules instead of just letting them go Why is selectively reabsorbing the good molecules generally a better strategy than selectively secreting out the bad ones? Glomerulus- group of capillaries Loop of Henle- loops around with exchange of salt Is this a freshwater or salt water fish? How do you know? Do cnidarians have a coelom? -no , have to be triploblastic with mesoderm, cannot have coelom What is ploidy of human germ cell?


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