bisc 220 mdt 3

bisc 220 mdt 3 - Third Exam l ‘ BlSC 220L — General...

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Unformatted text preview: Third Exam l ‘ BlSC 220L — General Biology: Cell Biology and Physiology April 6, 2007 1. Answer all 20 of the questions. READ EACH CAREFULLY! 2. Note that questions have different point values. In all, 125 points are or answer within the box provided for each question. Material written possible. 3‘ Write yo outside these spaces will not be graded 4, WHEN YOU ARE DONE, HAND YOUR EXAM TO YOUR TEACHING ASST. WRITE YOUR NAME ON EACH PAGE i YOUR NAME: USC Mark the box next to our TA’s name: U Gorjana Bezmalinovic El Carlos Cabrera Cl Jason Hoskin Cl Kun Qian C] Nicole Reece El Chunli Ren D Justin Schneiderman IE Erica Seuben U Yanbing Wang El Han Wang ‘ afl. in a summer job at We, mm ' fi' hman ear in Los Angeles, you beg ' I 3 pts. 1. Afier spending your emSierrajlat an elevation of about 8,000 feet. Keeping in A ould you expect that a camp store in the high _ mind the principles of negative feedback regulation, w 77in your kidney’s secretion of erythropoietin would increase, decreas ‘ same in the first few days after you arrive at your summer Job? b. decrease 0. stay the same increase w , .4 mew-c Rear" MW UL in BPC e, or stay the ach the following statements is true or false by writing the word “True” or 8 pts. 2. Indicate whether e “T” ‘lF- H ” in the blank. Do not mark with “False Trot: a. An erythrocyte leaving the left ventricle of a dog must pass through either 2 or 3 beds before it returns to the left ventricle. capillary Eglqe b. In humans, blood in the vena cava has a lower partial pressure of 02 than blood in the w pulmonary artery. iv EaWQ c. During ventricular diastole, blood pressure in the right ventricle of the human heart is slightly higher than blood pressure in the vena cava. gag d. Within a single cardiac contraction cycle, the atrioventricular node generate potential slightly before the sinoatrial node. 5 an action “decrease” in each blank to correctly complete the sentences. Arteriolar vasoconstriction will dew (N99551: blood flow through capillaries ‘"" connected to those arterioles. Blood pressure would be expected to 43m Hfllfl.’ (‘35? wease— as blood flows along the length of capillaries. If one is standing for a while and then begins to walk, venous return to the heart would {ya (5(le Ex 1 - 3 pts. 3. Write “increase” or 95+ . 5 pts. hich one of the following statements is false? if The concentration of proteins dissolved in the plasma is higher than the concentratron of proteins dissolved in the extracellular fluid. . aletspiratory gases and nutrient molecules cross the walls of the smallest / In ti:<::i::;itot::0tllfa:1::-rate at which they cross the walls of capillaries. for the enzymatic action oint 130:51::altron, fibrrnogen IS the normal substrate 1 % /d’. Production of blood cells occurs mainly in bone marrow. )6. Blood clotting in a dama ed ' i i ‘ contact With couagen‘ g vessel 18 triggered by platelets coming into Answer in box. Page 2 of 9 ‘ ‘ ‘ lution, the v t is the s: mficance of the fa t that during the course of vertebrate evo r 5' me heart bgcame more compleptely divided into fight and left halves? Be sure to explain Emotional advantage of having a completely divided ventricle, and to show your (7:! ‘ understanding of cardiovascular structure and fimction m different vertebrate classes. Answer in box. We 9icbmia'canu’ op intuit/g, a cowelevtelg cuw‘dcdm : ‘tVl the V90”, Ohms/«n (ic‘n ioloai’ w?“ “at mm can d‘tuzfiem Poo,- bbai. That’s i5 om advmfarae baa-J59. , 31nd, with 4r\m:5 adaptation? 61“ fine Haunt M leach?) We left Wide +0 00:15:? gifts 0 “HA6 \znoltd 00““ be \AE‘UV‘V Safdfrtt’CQ with otW-‘ :Negnop ficvtwaflom onlonoL cultln mLW 6:0“ SUPPES Metabolism puma lane bacibe Mat 6 won? :A:;fiw 01;? \ W at we at W ma am CO7, GM “A? \v} airing firtainratg (tags wk"— _. .i._,..———"‘ “—----~__—.... _ r .v -- ‘\n - ' . a __ .wc 3, fine 01 NC“ a Cth L‘Lutdz’ci er-frtcde/Scsr-h seesaw?“ M “COOL and Oz [300(- bier-Li i") («Ham-afflufc Mfr; M Hflf ventwde. This dIECsTUYS Hr? act-turcfl’ictr“ 0Q 510‘“ W‘UA Oke‘d‘hem b88139 v some 01¢be 00““ be. Wfi'flQtW’C-Q» To ‘HAC' 01 poor 510004.1—(‘Al5 -. P I} ‘ 7 Vi” b0 ion/Va fo-fanICLL/x 010 oxggjcagm SuEDPurfg lobb‘rir lamb) 0 VW c. OWZUS lc’SS (’Egciwfi‘m Livia/ma (*Lfifie’m "(’0 "We koala A describes what happened? d pH, which suppressed brain function and made him famt. 5 W b Hyperventilatlon increased the partial pressure of 02 in his blood, which m box \mhibited the respiratory center, \ Hyperventilation increased the saturation of hemoglobin with 02, but Vigorous exercise can Page 3 of 9 3 :7. mm why it is admmus for blend in ‘ opposite to the flow ofwatar over the gill. I m m is pan-in- Orcca'l‘fi and Wanvfaln‘5 5* COMMW‘” (2hr are», cach m»— w‘“ thd‘jrwd P"“"' cu in ~ 7 I Gum water ‘mto blacvaL. Q): to “W5 farm” 7 Wow 09 “Wit-{00¢ {‘5 "Hfle‘fl Wt'y’j‘nfi (“QNOH W ago/x laurha‘wffitlls .. We ?‘ l ‘ ‘Bn . t s F Gain dial «of agent: «Warmth» . b10060. (Add W "~ 3' .0 Iihw‘iflv?“ ‘ \OacLanoLunta lad lep‘r tectonic/"to watt—art with loath the \o r8 ‘ alum 39‘1. sol-fwhteoi 0’} HA CMfer Cjw‘ffi‘mk 5 W15 \C‘Utls 0p MGWVWME more eVFGMEJM' , UV 8. What is the relationship between temperature and the affinity with which 02 binds to hemoglobin? Explain the fimctional significance of this relationship. Answerinbox. DEW b‘molevaan‘méjoP “award/hum is {wweu ' it: tawgeratwt (.143 M b048, Ar \nJ- {awe-(arms hWbin has 01% low til-Mob? affihifa Groi- ‘ [mot at Low {Www Mmoawo‘m was a hijm loinchKa finimb/G‘f flnw~ MWML SITlBLC‘MOe 09 "CW5 relationship {5 final” in onea§+lmran== coo\,\|\’-€ ‘ l “ ' l axi- ‘io 10 incl 'Hne LKM W “mac «9wa w" u ‘ i ‘ Wm aka/“Kiwis {1cm ms {Mufmpbfiwu 0‘ “‘6'” 5M0“ , , tum [e ('0 a M 5aforafi'm a3 QT 491‘ M1"), 01 h” ‘U’f [W39 \‘ ,h n .- H505“: mas aG-lthe \oddr ‘ Wad- m WMf-l d0!— Ea “(Ida Vest +IWWVIW-‘Omheafl W5") ‘If I"? blind/V2 W’S_,‘?_"7’.°P€e€“zr .‘ * Rm, NM. pts. 9. Which one of the following statements lsfalse? _ .7 _ . Ar! Inflammation is triggered by release of histamine from basophrl-s and mast will. X. Both neutrophils and macrophages are thBOGYfic “115' . . k The lymphatic system drains excess fluid from tissues, “millions “PM” from “‘3 intestine, and houses many cells of the immune system. _ m). he (1. Plasma proteins. leaking out of capillaries in inflamed tissues, tend to m 1 it t accumulation of fluid (edema) in those tissues. - /Denddtic cells function in the presentatlon of antIgens to lymphocytes. 4 pts. 10. The major form of antibody in external secretions Such as saliva and milk is i I Plasma cells initially secrete antibodies of the ‘2! -type and later switch to U; antibodies of the -type. Antibo 1es of the \ {3 D -type serve as receptors for antigens n the plasma membrane of B-lymphocytes. 9 pts. 11. The chicken p0x virus causes a highly contagious disease. When children are first exposed, they are likely to contract the disease, the symptoms of which are usually limited to fever and rash. IL“ Symptoms last 5-7 days, and then disappear. If these children are again exposed to the chicken pox virus, later in life, they do not develop the disease. Explain why the disease disappears afier 5-7 days, and why a person would not contract chicken pox a second time. Be sure to name and describe the functions of the relevant cell types that make this immunity possible. Answerinbox. ‘1‘"- ‘L‘SMSQ Omar?“ aHW 5‘1 megs bau‘u‘be. slur. .kwse 6—1 daUS tire bot-{t6 l5 CiCdliN‘O 1r f0 FI‘Ofc’Of Her/f From ‘finlis new I. €01“!!ch cymbals. nib Micaen Ileana new cud-Cm?“ to {Me :mwwe “5754cqu attmafe S 4 P 3 OF down-'4‘ WHO *fr‘OV] , D411 443 HMS {351 Ibrl (H7119th ares/Jam a; B galls, who 1 " . r I l CFHA’aF "(Lt 15‘ Ct” ll Noe/lofcv’ (FY UN"? (Benita—cm W i u kiwi *H “1'39"”; I 1 f4“ S‘W’i' ‘tlv‘i PV 1 calls him? 4:ln- mt:nt T cars are. loindllnvthor Sow omic ,fl _ when as He lpw v US“! to? x e- chin}; — ll - fl w W m-ti ccwplccl “to cm tic “ 5 (5 U a“ w Prey" ' if :66“ I _u w.“ aunt/qr: t c Lass IL phat-earl (Andi/(“q 10"! "a"! I? C D i'l ff‘tk‘e ckeclrif ‘-( “a (N Cr I K465 r - “ r .1 ~ . Kars‘ ' l C'r" Ht'Pt/T 0e“, W PW pelequYa Lite.“ “lea-fl will then was tit helper T can -—t’<: F'mlr‘eumefiie um; me‘JWFQ \ 00 N WT otter—Ms tcitr‘artr‘wa-{M other T o'éHSltm cl, HM; 3‘06“ u-‘V‘O ‘3 ‘9‘“ Yr: eve-ha . U'\mamrvn+\cn I 1% B can wgu also Frrltéqate 1 PW dot-1W uJo Stats uéctonesfiw scar ucvl‘t be native PIGSWQ Bag“; whfijn ‘Wlll 515W: Whle Lbrfimck {Rnlatef C7 (411‘: load}? I '1 Spailfiziév ’tlr‘t’ LMTIfieV‘ 1 Tire,‘ cot-tibcdltfig a. If “kW/fl block “he C'fl‘t‘la’e/VN (MIL \kducerhotro “54.05"; Var mus . v r - uvcwoas such. a; neat rollC-61T\Qfl U‘r- aaalmma‘hm- Aérer the Mn boat) habmgn FMA’MUF if“ “WW” (“Hot award SOTO? (W3 [(Wnrhcn‘j Bud‘s, mm “me‘n 6“ bin“? and Ui‘aqmfi‘af “flack— +V€ MT‘YU‘M “to-m fixtlner 2L? ‘ 1. not qllcwi n" ‘1 {0 “Wm “N be our l-e Sun-L oreurv, URN/l (st-{m} 1;- mute“; Vb, *V‘ ‘ Ole-sue bith ' ,. . . t .W .- Mic amt («plat-s on VI’US méceted sewn-m9 61"“ rag-kth 1 Rated ceilfi ‘ Thu: also ppcn'Fcrme Mfa ac,er Clam” our! Mm» aims. m Page 5 of 9 WW“ wart-ignite defied G's-m (W‘W WPaSvy-e . ' 12. Briefly compare and contrast the innate (non-'Ipwiflfi) immune WI?“ 99 i ‘- the specific (acquired) immune defenses. Give your answer iii genera W. t ,_ ‘- coils, organs, and mechanisms involved. Answer in box. Mm ‘r—c . immune defense: sew coat ' _ W$Y{ Wm intirt bomb, amt W‘UDWSM‘O“ incisions-6:; . ' ' are “cib’l'fcp- Minnow olest Or'P— vents speeaoirarenohmm wee \V‘MT- Est-WM: twain antigen is N wth m and” ta 49g” immun‘it .Tiflfilb [WWI MW; amm'ig‘n vt-a TIA-1N larder a“. WME mfl‘obtwaprcrtcw 9m 415643: mofiihfwhw‘ - W9p¢u \ “3’ againsWM am“? “Why” WM? {H (“our ‘ h i . .3 with {Waite deknseSfiud/Wd 5“” “ML “W” ' a“ 5 aclwwc-(flmmwc Acé’wg—es Function Entity . WW . bi +W m+rczlsutic~i cc SPfiafiC (wax/i ow, rs Wham S't’IquU‘f‘eai ta - C I innate iwimwe deGeA/i , i I [F m war“ [mom Haws. He lune/ital oi“ cacti-Uin ,iMMW-qér m‘mfihncp 1142,95 whys. P F in 13> n i'nr‘afe (.mmM-(a' (Witt-exits. 2 EH 5% \prvm chicane mth‘fl’fe I’i’lmw 5); View. M fl? ' a ‘ '[LQ \nM’E finiuya WKiXAcn 5mg but five. “mmm Hs+ew (awrwhs bfi‘h adore! (:wd PtruBiV'i ‘H’V‘ \ “(foil/«ed i'mmbwt' 5169319585 are rng taut/we. 4 pts. 13. Which one of the following best describes the difference in the way B cells and cytotoxic T cells respond to pathogens? 3. B cells secrete antibodies against a virus; cytotoxic T cells kill virus- infected cells. B cells respond the first time a pathogen is present; cytotoxic T cells Answer in box respond sub sequent times. if B cells accomplish cell-mediated immunity; cytotoxic T cells accomplish humoral immunity. f B cells are involved in innate immunity; cytotoxic T cells are involved in acquired immunity. ,e./ B cells kili viruses directly; cytotoxic T cells kill virus—infected cells. 3 DIS. 14. The major histocompatibility complex ,if encodes certain antibodies. Answer' - p u M /bf inhibits complement release fi-om macrophages. m x c. encodes a group of cell surface proteins. . conSists of Y-shaped molecules. i‘ls important mainly in allergic reactions. Page 6 of 9 1'5. Homeostasis of the water and salt content ofth! W5? 9°.“ I . V fiSh- This is because the ionic com osltion and emetic ' ation in , .7 ‘ they live is quite difibrent fi'om the? of their blood and extfwallulu' fluid. WM g VF \W‘ bony fisshmatar fish, briefly describe these challenge? arid the slimmest Y "e Matti“ 58h to overcome them. b) Then, do the same for M bony fish. (N. . -— cu . at“ W" cfist‘uss anadromousfish.) 5“ MC 6M0.“ amowfl's beAY ‘Hnr 44,1 0&“91 That E, arm'- the osmtk cum min 4cmwa xiid‘cfi awrwra F'ch 2:: "‘1‘qu bad? and M + ‘m final" \ocda « \fl order {0 Fetal“ culfifi urinfiieépel‘” access Marlni lama damcpp -‘ . u» Glaswcicu‘l'op' K - ‘ wu-irmmrt ‘ r A {tar mt: a? Car W out E's-in drmVF— a M up or k a , ‘ . . Akl‘fi v _ 6‘ ' ‘ l‘n Wale/f ’(‘C‘ ‘W‘V‘ffl‘n "WW-o H‘ 4 i ‘ 5‘ _ *0“ wwfivfi 9L ‘ NoJK Vale/ewe o M r M’fmln LAM-rear cit/(Alva 61cm: ‘ ‘3! 7h ( co Renate 9 LAN. .Tbxi’agemv +\n(, mow V“£€i.il<‘fi "We cod—C(‘s‘z 30“ {‘9‘ CW “314171? «km: S‘mr fume-MW S 0nd . :3; w afar , rcr'tum 8 pts. 16. Indicate whether each of the following statements is true or false by writing the word “True” or “False” in the blank, Do not mark with or “F. fr 3 g a. The net effect of atrial natriuretic hormone is to reduce blood pressure. frog b. Both aldosterone and antidiuretic hormone stimulate reabsorption of H20 from the tubular fluid. Sr UK c. Reabsorption of H20 can occur everywhere in the nephron except in the ascending limb of the loop of Henle. (fill? d. By blocking the action of antidiuretic hormone, alcohol causes excess reabsorption of H20 in the kidney. Page 7 of 9 ‘ ' ‘ l ' ' t ll contain glucose. _ . 8 pts. 17. 3) Briefly exp am why urine does no norms y ficant concentrations “glucose, Expmn ic of diabetics. b) The urine ofdiabetic patients does contain signi _ _ t how this contributes to the increased urine output that 15 charactens Answerinbox. Urine, does not M‘Mallfi- contain 0603?, \oeéau‘flb"; ‘ is G‘ikewdt W‘ a? the blood. Kin-we am mfo T {k wai‘mal {mane (JCWVQ WWI”. “MAR I ' a afoul I‘d \n‘fo 5°¢i~wéwf was“? WW W” 5W. ’c’lmivrfjwwcg‘oicfelpam Wtth which ‘H’m allow 9A1!“ 9' ‘t {lied _ l - ‘ ~t in _ I 10L “creased Urma outw- tkmwe S We iinfo H4 Lia: l wow-ya “VB/Y vro‘ckuck Whit: due to M Got-WM N’" “@54me \ -+ (PM «new " * 53m" 0‘"- tubde‘ar ewa'he/re clad? in Hm wept-ramtnueclaéa H" C b «a» come we. tithes mom has». 1M rWvaW— - ‘ ‘. 3 u 0-? LJ<5~J€€f will W lé‘ml ‘l'o mm 86W“va 09 (A \m ME More 'Q‘fiW'f-t rut-tic“ . nm on i) gated/ed (was;wa .34 did ‘3 ,{ Vich all“! “er 10 pts. 18. In the laboratory, you have isolated a segment of a rat nephron. Into one end, you introduce an aqueous solution of NaCl and urea. When you compare the fluid collected at the end of the d, segment with the fluid introduced at the beginning, you find that the volume of the fluid as well / as Na" concentration have decreased but the urea concentration has increased. What processes l are occurring in epithelial cells along the nephron that would account for these changes? Be sure to name any plasma membrane channels, pumps, or transporters that are likely to be involved, and to state whether each of these channels, pumps, or transporters is located in the apical membrane of the epithelial cell, the basolateral membrane, or both membranes. Answer in box. 11"“? WEpfs: 0C tint", (told has) atteawosect tidal-")3 a? ‘06ch flan“ “V'd PHW'IJ‘?’ +F1r0p-f‘4’r 0C Liv-T tut Cit «Ur-Q (\‘i‘nnt‘tvii 'Tlnns .foces‘; bet?“ “if PWHW‘TME WW Cl 106/ K" with -iw-~~~’*~"U'l l?) M P. ‘5 “mm 0“ fl‘e W‘SO‘O-“Wml “WM‘W‘W' of We Imp-"(‘(H’tttd at“ « "Um? PW“? mat—Mia»- PVMP') Mr cut orflt’ (,éll (Moi [1“ (IA‘fnCTLC [cl lefh,;¢_ 3 Cut 01",, L “WINK a“ «N ('Vict'w‘ it"Q'Mlmu-ne . This amt-dc“) (4,, W0, (4' to“; Lb)va L_L,‘~,i;t.iw‘\"\r€' ILL“ Jr K'L'w‘vc'rrd (-1, +1” ,v.._-w VH6] mfia Lia‘s; org—m ct' {N to 50A- 8 ‘ Gétzu‘ar 0-“ “I” 5 IL “' m ‘5 +V'elt’rrcmjp, hall tofu HM (ml ind mm or «Wine! a Given»?! Cine!" AM” '2 PW“! S'a’wfn't' J} L i. “(-1; HvfilTN Aha" J“; {tr-n Pam—)‘flf “If 1],? “4:71.; Mi.” New (allows V’UL'Z'mo‘g) will)“ WWW”? w W‘V‘““"t"‘-"‘CW4 We ‘C‘stfl 'mw‘buw‘fi " U‘JCKW 1(an .ll sv-ur'i (lvtli'ru bi”, nut 0’:1 1“? (itsu‘w‘ (I ‘w 3' he“ch (H “AVG? RHUnW, bug you 1,L“ raw-01,27 W HQ‘VWYW fl(v (pf (\M‘W Wye-(fluilofm (balancing \imb WW;- 0 "0" pt! .w thin? U, Art-1 “(wt-r 3mg: [pa-«e; (W ;t Can't?!” Ma“ Pa “WW”. l-ilriuwsw‘l , *u'w wtil (Juli-JV {Tc-pap?” I) (“Cedrtl 1 ma.prc,\n‘ir|a -{W(Gw“(fi_“zm.r'm -(ub...\OV( Qimicl‘ wvtéui barlét [Mn U? L‘Asrtnl '{vaU‘\el k.) Mv‘vogvthL I (V‘U‘flyta M NO {-0 "qu-9, I (And, (um/(H 0111-. +0 lot Wumxpdg‘ritmr when 1'; (Help. JFM 4"”, i ‘7 ducky“ _ 00‘. l‘ ' 'mLu—fl. ' J04“; Ut-CLI. PbLL- ,cfi’tuut iNW .3 “PC “at a" ‘J‘ ‘ IN. - Hz 68‘“ “km a?!) ‘ mutant was «obxibmlJ-afi m 1 ‘ 'Y wow-um- u f Page 8 oi“) ,. m 3 pts. N I2. ' ' ’ ‘ ' ‘ ' ' ' the inner medulla 19- 811°“? e’Xplam the mechanism by which interstitial flurd to ma] fluid in the comes to have a much higher concentration of NaCl than intent I . 7 ' - - ‘ s mumemnce or k‘de- FOCUS your answer on the creation of this osmotic gradient, 110* 1t function. Answer in box (the “Winleltlid of Hr! {any mob/U6. fifitke Wain M” can oemtyrariow oG Una Ham Wkflflr'fi'IFIt/Ild 1M of '9" LOCpO-F Warfle , Uri inc? a"? irks-42 creates TN ‘06 mkotin , Quid dw i 9?, “AOL-them douwx apaai‘n. “Mb 0C [my \ 5‘ veer SC, {1 HW‘C IS UHCJalLtG um i” {h o ‘ Pf Ee/lvuhols TN aggwd/tlna/ (rW‘b '7 nor-r Wad, {’0 “seer—mi kWV cull/{S Nap! out 53 ‘Hrt W4 I “ft/1'ka matrix“ m lMe—ffi't‘rtia\ fluid. This 06M? PciSSIWf at QM W gown . Tlrt clothe 'Hfleun becmg ‘ \ mg on? i \ " ‘T‘a‘ J?! la". [was one“ {mi/W VlCN'éqgcg AM E liq-1,4 {H (:p H L)‘ t - - CI: ' [W V5446” WWW demand! (w giuict. HM 551 H afso [Eguf5 ,m (Mtg cart?"- Gtw OC— F/Qrcfl ,‘n m (some cigar. W _ in mm he L's-«LL93 as. ‘ur ‘ r - " 'f does “0"- ‘H’5 ‘3 ‘olocCL (mist A" ‘H’"c7 Frau“ “(~32 I - - Ci pods Min AGES i“ ‘U'fi WW\ and riiH'cL‘ kU - in CUM OI.- Buaa H buies cg - " 'H lava? ' i - u gawk-m [Ma airs owe-n+6 cilif‘evticm, Hr“ descending f a J ( Adjutant“ ’(‘o OF 4R IwcpoFHmk' OCRMM moi Adv-fl «Sch/lathe cud—jaw 4f 'foflre O’C’Swmclmsg (tin! 20‘ Among the forms 0f nitrogenous excretory wastes used by animals, the form that is most soluble in water but also most toxic is figmmmlu \M . The form of nitrogenous waste that is mainly used in humans is U} e (5 . The form that is Uric Mel mainly used by reptiles, birds, and insects is Page 9 of9 ...
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bisc 220 mdt 3 - Third Exam l ‘ BlSC 220L — General...

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