Prenatal and Puberty Development: Hormonal Factors and External Influences, Quizzes of Animal Anatomy and Physiology

Download Prenatal and Puberty Development: Hormonal Factors and External Influences and more Quizzes Animal Anatomy and Physiology in PDF only on Docsity! TERM 1 prenatal male development DEFINITION 1 fetal testosterone defeminizes hypothalamustestosterone crosses blood brain barrierno development of gnrh surge center TERM 2 prenatal female development DEFINITION 2 fetal estrogen does not cross blood brain barrierbound to alpha fetoprotein prevents entry into braindevelopment of rngh surge centeractions lead to different postnatal lh secretion patterns TERM 3 lack of estrogen causes what to develop DEFINITION 3 causes surge center to develop, both tonic and surge in femaleonly tonic in male TERM 4 female definition of puberty DEFINITION 4 first behavioral estrus- ovulation- cl- p4first ovulation with or without estrus- cl- p4support a pregnancyconfirmation of clmust reach a threshold body size TERM 5 confirmation of cl DEFINITION 5 rectal palpationultrasonographylaproscopeprogesterone concentrations TERM 6 male definition of puberty DEFINITION 6 behavioral traits first expressedmounting and erectionfirst ejaculationcoordination of nerves muscles seminal fluidssubstantially precedes ability to produce enough sperm for fertilization TERM 7 ejaculate DEFINITION 7 threshold spermatozoa for fertilization- puberty definition TERM 8 bull: DEFINITION 8 > 50x10^6 sperm/ml w/ 10% motility TERM 9 factors affecting onset of puberty DEFINITION 9 age chronologicalvaries greatly among species within a species and gender TERM 10 maturation of hypothalamus DEFINITION 10 gnrh increases gradually with increasing age male and femalefemale: prepubertal pituitary and ovaries respond to exogenous gnrhendocrine control of pubery TERM 21 social cues DEFINITION 21 olfactory recognition of pheromones in urine TERM 22 phermones DEFINITION 22 chemical compounds secreted by body are volatile and detected by olfactory system of same species TERM 23 swine external DEFINITION 23 puberty dictated by number of gilts in pen and exposure to intact malesfence line exposure similar to physical contact TERM 24 early maturing breeds have DEFINITION 24 earlier onset of puberty than late maturing breedscattle: angus < charolais, brahman TERM 25 maternal breeds reach puberty DEFINITION 25 earlier than meat type breedscattle: holstein < charolaisswine: white landrace < yorkshire TERM 26 hypothalamus is which gender DEFINITION 26 femaletestosterone defeminizes hypothalamuseliminates gnrh surge center in male TERM 27 female has no ___ so she develops ___ DEFINITION 27 testisgnrh surge center in hypothalamus TERM 28 why doesn't female defeminize hypothalamus DEFINITION 28 testosterone converted to estradiolestradiol cannot cross blood brain barrier to brain TERM 29 can testosterone cross the blood brain barrier DEFINITION 29 yesit is then converted to estradiol in the brainthen defminizes hypothalamus TERM 30 puberty DEFINITION 30 ability to accomplish reproduction successfullyprocess over time not a single event TERM 31 fundamental requirement for puberty DEFINITION 31 gnrh at appropriate frequency and quantities to stimulate gonadotropin release by pituitary TERM 32 gonadotropins promote DEFINITION 32 gametogenesissteroidogenesis and development of repro tissues TERM 33 most important drivers of pubertal onset DEFINITION 33 ability of presynaptic neurons to provide info to gnrh neurons TERM 34 breed affects on puberty DEFINITION 34 different breeds reach puberty at different ages TERM 35 major factor limiting onset of puberty DEFINITION 35 failure of hypothalamus to secrete sufficient quantities of gnrh to cause gonadotropin release