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Unformatted text preview: "#$%& ($&) *+,&#,- ./0#1- 2-1034 5($&) 2/0$& 63%7-$ 5($& 8 9: &% -(1/;) 1, Which of the following occur in the mitochondria in animals? a) Glycolysis b) Citric acid cycle c) Electron transport d) b and c e) a, b, and c 2. How does the kidney ensure that glucose is not lost in urine? a) Facilitated diffusion with a glucose carrier b) Active transport using a glucose pump c) Glucose is selectively retained and not filtered into urine d) By using a symporter to carry glucose with Na* 3. Sharks in seawater absorb water through their gills and skin while bony fish in seawater lose water through their gills and skin. What accounts for this difference? a) Water transporters in the gills and skin of sharks that are missing in fish b) Chloride pumping in fish gills and skin that does not happen in sharks c) The buildup of urea and TMAO in sharks but not fish d) Concentration of urine in sharks but not fish e) The maintenance of Na*and Cl- levels equal to or slightly greater than seawater in sharks but not fish 4. For a terrestrial vertebrate, thirst would be stimulated by: a) Increased ICF concentration b) Decreased ICF concentration c) Increased ECF concentration d) Decreased ECF concentration u Biology 225: Animal Phys Name: Anne A Student Exam 1 Fall 2005 Meyers 5. A cell that only expresses potassium channels and aquaporins (assume everything else is impermeable) has the following ICF and ECF: <0+ #3=-1& ( 0&(%%#+> 1/-,(&0$ 9( 4$+? &/(& (@%0$@% 0&(%%#+>; #3&0 &/- 1-,,A 7/#1/ 7#,, $->0B- (,, 0C &/- 0&(%%#+> #3%#4- &/- 1-,, 9&0 ( ,-B-, 0C D8>*; E/(& 70+,4 /(-3 &0 &/- 0&(%%#+> (34 7(&-$ @(,(31-F a) Potassium would leave the cell and water would leave the cell b) Potassium would enter the cell and water would leave the cell c) Potassium would leave the cell and water would enter the cell d) Potassium would enter the cell and water would enter the cell 6. Nucleic acids can be used for all of the following EXCEPT: a) Information storage b) Intracellular signaling c) Energy d) Catalytic activity e) A component of membrane 7. Which of the following maintain the osmolarity of intracellular fluid to be isoosmotic to the environment using both inorgranic and organic osmolytes: a) Squid b) Sharks c) Tuna d) Both a&b e) None of the above 8. lf a cell( with1 50mMK * inside)is placed in ECFwith1 0 mM K*,one could measure the rate of f K* leaking into the cell through a K+channel.To cut the rate of K* entry through the channel in half, to what concentration of K+ would the ECF need to be changed?...
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