Exam 3 - Print We use ' i. Elassii'i:r each or the...

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Unformatted text preview: Print We use ' i. Elassii'i:r each or the idlldwlng as a mechanoreceptor, chemoreceptor or I .. electromagnetic receptor. iiu pointsl - - a. r:.|' '. . - '. -.T -T-- a.- cone cell o. hair cell _ IL .- c. oli'eetpri,I receptor' a -"'- d. infrared receptor . -'.'_:-:1 ' - ef-taste bud - 2. r'i'adonna. a scientist, is studying a single neuron synapticaliy liniced to a piece or muscle tissue. Normally. when she stimulates the neuron with electrodes, neurotransmitter is released and the muscle contracts. However. in one experiment, independent of how she stimulates the neuron. the muscle never contracts. The problem is either in the release of neurotransmitter or in the post-synaptic receptor. Describe a simple experiment that would distinguish between the two possibilities. {12 points} 3. Phloem sap flows using a "source" tp "sink." transppr‘t system. in a flaw words, define a phloem “source” and a phloem "sinit". Can the same plant organ be both a source and a sink? ianswer with yes or no). iitl points: Print Name ' 4. I2!ese.r'1he-Lr'sher'mrlealh.r what happens ta a pest-synapn: eell 1when the ' neuratrahsn'iltterfihEle, ls releasetl into the synaptic cleft. tltl paints} ,- a - . -. 3:73:53.- '- ~ 5. 1n'hat Is nitragenase and what does it de? Glee ane at two examples demanstratln'g haw thls helps plants grawl {ltl puzllntslI Er. Axel ttluehes a warm plate, then he teuches a hot plate w1th hls hand. Draw and label graphs showing the generatar potentials and the aet1eh petentlals triggered by the warm plate and the hat plate. (label the graphs, e:-:r.llahatar3..r sentences are net required). III? aalntsl Print Name 'r'. The ieliewlng are descriptiens ei' mutant plants that have been iselatee and characterized. Eirerg.r plant has a mutatien reducing er increasing ehe er the knewn plant hermehes: Fer each plant, name the hermene and indicate whether the hermene level is reeueee er increased. {Answer in 2 te 3 weree fer eachiI ii 5 points}: r “1. a. he ehetetreeic reesewaeiiaei’w apical eemlhant grewth: I I axle-n e. lenger interneees. i'ast ripening fruit: c. tacit ef dIZII‘I'l'lEIl'le'. wilts easily: cl. EKHIEI'T grewth. hermal phetetreeic reaeenae: e. ne leave lees during rail: 3. Hew tie the iellewlng situaticns affect changes in the c',-:-:sias*..‘.c cancentratien eir calcium eh'ly 1n the ere-synaptic cell? Feces Veer 5:".52' answer eh changes in cyteelasmic Ca? cehcentratien enTg. tie eeints} a. T'l'li. tetrecletealn. which elecits eeltagese'eeeheent seeiem channels; is applied in. TEA. a chemical which hiecI-te 1weitagentie.':.:enclant eetassium channels] 15 anelied c. -hungerete:-:in. which hlecits acetglcheline receptera, is aeelied .I'.:_-'.'.:- .'-'..-_ H. 1 cl. A large chlericle ceheuctance aliews Cl' te ilew ireelg eewn its cehcentratleh gradient in the eresynaetic cell "'\-. Print Name 9. Suppose there is so tnotatousl who carries a mutation sueh that the surface of that person‘s T-he1per lymphocytes and macrophages only so not earn: the CEM marker. Would this person he suseeot1o1e to HIV infection? Explain your answer. 1h'hat about the secondary threettohs characteristte of moss {5 points} , _ - T_ H 1:95 '3'? l'fl ...
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This note was uploaded on 04/28/2008 for the course BILD BILD 2 taught by Professor Schroeder during the Spring '08 term at UCSD.

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Exam 3 - Print We use ' i. Elassii'i:r each or the...

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