ANSC 2133 TEST 3

ANSC 2133 TEST 3 - ansc 2133 test 3 03.20.07...

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ansc 2133 test 3 03.20.07 -homeostasis-metabolic and physiological processes to maintain body’s equilibrium despite what is going on in environment. -homeorrhesis-series of events, physiological and metabolic, that help support a process that animal is going through. ex. pregnancy; nutrients repartitioned to supply fetus. physiologically important tissues (maintain homeostasis) -muscle: skeletal -involved in work and structure -serves as protein reserve (under extreme conditions only) -accounts for 16% of 02 consumed -during rest, muscle tissue metabolizes fatty acids. during exercise, glucose is converted to lactate under anaerobic conditions -adipose -insulates, protects, used for heat, energy reserves -energy stored here as triacylglycerol (TG) -mobilization of fat results in release of free fatty acids (FFA) from glycerol. used for energy -liver -processes and metabolizes nutrients/hormones -detoxifies antinutrient; which prevent absorption of nutrients -biosynthesize glucose proteins, fats, nutrients -accounts for 25% of all o2 consumed or energy used -major site for gluconeogenesis (GNG)-the production of glucose (extremely imp for ruminants bc rum are always in state of gluconeogenesis) -kidneys: renal -maintains water and mineral balance -filters out toxic substances -aids in acid-base balance (critical) -site of glucose metabolism and GNG, esp during neg planes of nutrition 03.22.07 -GI/digestive tract -absorbs and processes consumed nutrients -1 st stop for all incoming nutrients -guides nutrients utilization -accts for 25% of o2 consumed. it is a lg and complex “endocrine gland” -CNS; brain > -has an absolute req’t for glucose -insulin independent glucose uptake and use -mammary gland -has req’t for glucose >these 3 req glucose but not insulin -insulin dependent glucose uptake and use -utero/placenta/fetus complex > -has req’t for glucose -insulin independent uptake and use -skin/hide -protection, insulation, evaporation -fiber production -sheep hides can acct for 18% of energy consumed endocrinology *see handout!* Hormonal regulation of cell growth------------------------------------------ endo: the study of endocrine glands endocrine glands -group of glands in the body which synthesize and store hormones; ductless glands (does not req duct system) which release their hormones directly and internally into the bloodstream
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exocrine glands -group of glands which secrete their products (saliva, enzymes, buffers) via a duct system hormones -chem substances that are secreted into the body fluids by one or more cells and has a physiological control effect on other cells of the body. they are chem messengers which stimulate, without direct involvement, a chem reaction. they bind to specific receptors and modulate the rate and extent of a wide array of biochemical reactions and physiological funcs by specific actions in a wide array of cells. what processes do hormones regulate?
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ANSC 2133 TEST 3 - ansc 2133 test 3 03.20.07...

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