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Exam+1+--+Fall+2005+--+ANSWERS+_do+not+distribute_ - f...

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fto{'os 'fY\Mfj'e u Biology 225: Animal Phys Name: Anne A Student Exam 1 Exam lnstructions: Student lD: 12345678 Please make sure that your name and student lD number go on every page of the exam, including the Scantron form! Yourexammay be separated for grading, and if your name isn't on a page, you will not receive credit for that page! This examhas 2 parts. The first is multiple choice, which are to be answered on the Scantron forms. There is a single answer to be bubbled in for eachquestion in thispart. Again, make sure that your Scantron forms have yourname and lD on them! The second part is short essay. The questions generally require onlytwo to four sentences to answer. Part 1: (2 pts each) 1, Which of the following occur in the mitochondria in animals? a) Glycolysis b) Citric acidcycle c) Electron transport d ) b a n d c e) a, b, andc 2. How does the kidney ensure that glucose is not lost in urine? 3. Sharks in seawater absorb water through their gills and skin while bony fish in seawater lose water through their gills and skin. Whataccounts for this difference? a) Water transporters in the gills and skin of sharks that are missing in fish b) Chloride pumping in fish gills and skin that does not happen in sharks c) The buildupof ureaand TMAO in sharks but not fish d) Concentration of urine in sharks but not fish e) The maintenance of Na*and Cl- levels equal to or slightly greater than seawater in sharks but not fish 4. Fora terrestrial vertebrate, thirst would be stimulated by: Page1 of 9
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Biology 225: Animal Phys Exam 1 Name: Anne A Student Student lD: 12345678 5. A cell that only expresses potassium channels and aquaporins (assume everything else is impermeable) has the following ICF and ECF: lon ICF ECF Na 1OmM 150mM K 150mM 1OmM cl 1OmM 150mM PO+ 150mM 1OmM Other <1mM <1mM You inject a potassium chelator (a drug that absorbs potassium) into the celi, which will remove all of the potassium inside the cell (to a level of <1 mM). What would happen to the potassium and water balance?
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