REPRODUCTIVE BEHAVIOR Search identificationofasexualpartner courtship exhibitedafteramate is identified domesticmammals initiated infemale Consummation Endocrinestimulus EZ primaryendocrinestimulusthatelicits reprobehaviorinmates females E2bindingtoestrogenreceptorsisresponsi formodifyingbehavior T primarygonadalsteroidproducedby testis aromatizedto EZinbrain specificallyassociated w copulation I Zeprobehaviorsinfemalecanbefurtherdassified OIL Attractivity signalstodrawtheattentionofamale Expostures vocalizations behavioralones pheromones Troceptivity stimulateamate'sinterestinmating Ex headbuttingmountingthemale femalefemalemounting Receptivity indicateafemalewillacceptmating Ex immobility taildeviation backing uptoward male Lordosis matingpostureassumedbyfemale significantvisualstimulusfor males I I II Pheromones chemicalssynthesized excretedbyoneanima influencesthe behaviorordevelopmentofother perceived byolfactorysystem vomeronasalorgan detectslessvolatile pheromones ductsthatopenintotheoralcavity FlehmenResponse upperlip iscurledto d airflow to thenostrils Tairflowto vomeronasalorgan Auditory tactile sympathetic adrenergicreceptors parasympathetic no receptors regulationofbloodoutflowfromthepenis compression of veins shortcopulators 2 6seconds intermediate 2060seconds longcopulators S 30min estradiol primaryendocrinestimulusfor malefemalereprobehavior parasympathetic vasodilation Phosphodiesterase5 mediatesmechanisms that promote vasoconstriction ofpenile arterioles lordosis visualstimulus for males stimulation ofskeletalmuscles stimulation ofsmoothmuscle afferentneurons ejaculation efferent afferentneurons sexprep hypothalamic comparisons between ruminant thonmminant ANIMAL PHYSIOLOGY I The following diagrams depict the afferent and efferent pathways associated with ejaculation and sexual preparation in the male. 1. Fill in the top boxes to indicate which stimuli activate the afferent (sensory) pathway. 2. For each stimulus listed for step #1, indicate whether it primarily occurs during searching (S), courtship (Ct), or consummation (C). 3. Indicate the type of neuron activated by afferent signaling. This neuron’s secretory product will activate the efferent response. 4. For the neuron provided in step #3, indicate both the name of the secretory product and the type of secretion. 5. The names of the target structures associated with the efferent response are provided. Indicate the cell type associated with these structures that will be stimulated by the secretory product listed for step #4. temp O O ejaculation pressure alphamotorneurons acetylcholine neurocrine skeletalmuscle 1 ANIMAL PHYSIOLOGY I sexual preparation Ovisual 0 olfactory 0 0 tactile auditory hypothalamicneurons oxytocin neuroendocrine smoothmuscle