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Lecture 20

BIOB34 OCTOBER 1 LECTURE 2013.docx

5 Pages
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Department
Biological Sciences
Course Code
BIOB34H3
Professor
Jason Brown

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BIOB34 OCTOBER 1 2013Thorax is where flight muscles are located thus thats the part that warms up regardless of ambient temperature it stays at a certain temperatureInsects have some capacity to maintain a regular body temperatureoThorax is more well insulated than the abdomenoAbdomen is not well insulatedoThis means if its flying on a warm day it would warm up the thorax so more of the heat will be gone towards the abdomen so it can be dissipated easier since its not insulated wellHeart rate of flying insects is higher in order to circulate hemolymph faster through the body so it can go to the abdomenThey can regulate their wing beat frequencyIf you beat your wings at a lower frequency you generate less heat and stay relatively coolIf insects are flying at cold temperatures they would have higher wing beat frequencyFEEDING AND DIGESTION LAST LECTURE THAT WILL APPEAR FOR FIRST TERM TESTFatty acid is any carboxylic acid with a long hydrocarbon chainIn animals there are about 50 fatty acids160 means 16 carbons and the zero tells you there are no carboncarbon double bonds As long as there are no carbon carbon double bonds its a saturated moleculeOleic acid has 1 carboncarbon double bond is and the omega 9 tells us where the first thdouble bond is Located at 9 carbon from the end Double bond on carboncarbon makes it unsaturated fatty acidsOmega 6 tells us where the first double bond is from the end of the molecule but not ndwhere the 2 double bond isSLIDE 6Fatty acids can be broken down through beta oxidationBeta oxidation takes place in either mitochondria or peroxisome right side Chain length determines where the molecule will be oxidized Anything 22 carbons longer goes
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