EXAM3StudyGuide2 - Alvergne, A., Lummaa, V. (2009). Does...

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Alvergne, A., Lummaa, V. (2009). Does the contraceptive pill alter mate choice in humans? Trends in Ecology and Evolution ; DOI: 11/3/09 A question was asked in class today about whether female hormonal contraceptives alter mate preference/attraction. Body odor is related to some genes that are involved with the immune system, known as the major histocompatibility complex (MHC). In class, we discussed that women tend to prefer the scent of men who do not smell too similar to themselves. It is also of interest to note that when pregnant, women’s preferences shift to similar-smelling men. Thinking of this in evolutionary terms, this could be an adaptive way for 1) women to choose mates who are not too genetically alike and 2) women to surround themselves with those who are more genetically alike during pregnancy (ie. family). Looking at the above table, you will see that women who are using hormonal contraceptives tend to prefer the smell (MHC scents) of similar men. This is not surprising given that the oral contraceptive pill changes the hormonal state of the menstrual cycle to mimic pregnancy. The remaining question is to what extent this change in preference actually guides behavior in the real world, and at this point there is not much scientific evidence on this topic.
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Mised Class for BioPsych Internal Regulation Terms Homeostasis Set point Negative Feedback Allostasis: change of baseline level, setting body to be functioning in different level in general I. Temperature regulation How do we maintain temperature? 2/3 fuel = basal metabolism Most of calories you intake, is expended on things we aren't in control of, when exercising, decrease of weight is caused by increase of basal metabolism a few hours after you are done with working out. cooling down physiological? behavioral? warming up physiological? behavioral? Neural mechanisms receptors? AH/POA anterior hypothalamus/preoptic area monitors itself- what temperature is receptors in skin: feedback to brain to tell what temperature is Largest physiological response when both receptors contradictory in some way Fever Stimulus?
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Infection ie. Toilet water What is the sequence of activation? Infection to white blood cells to. .. Cytokines can stimulate vagus nerve Prostalglandins will be released through hypothalamus Not good to keep fever above 100, 109 is life-threatening Ibuprofen and tylenol work in different ways, so can take together Function of a fever? Bacteria more susceptible to higher temps, can't survive Seizure can occur when have high fever Thirst Body has three water stores: Intracellular: majority in cytoplasm Extracellular: outside of cell fluid intravascular fluid: 7% cerebrospinal fluid: less than 1%, ventricles and spinal cord interstitial fluid: fluid standing between cells: 26% Body has three water stores: intracellular = osmotic thirst, have to be balanced extracellular intravascular fluid = volumetric thirst
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This note was uploaded on 04/27/2010 for the course BIOLOGY/PS 101/220 taught by Professor Hogan/loeb during the Fall '10 term at UNC.

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EXAM3StudyGuide2 - Alvergne, A., Lummaa, V. (2009). Does...

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