Term
| In the estrous cycle, PGF-2alpha spiking to induce luteolysis occurs during what phase? |
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Definition
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Term
| If the left uterine horn in a mare was removed on day 8 of the estrous cycle and her ovaries were examined 14 days later, on day 22, then one could expect to CL on... |
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Definition
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Term
| Prodecures shown to be successful in shortening the beef cow's lactationally influenced anestrus include... |
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Definition
| replacing the cow's own calf with an "alien" calf |
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Term
| If a long acting synthetic GnRH antagonist was injected into a boar you would expect vesicular weight to.... |
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Definition
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Term
| Proposed luteolytic mechanisma include |
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Definition
- interruption of the luteotrophic action of LH
- Apoptosis
- Hypoxia due to vasoconstriction
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Term
| During ovulation, granulose cells.... |
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Definition
- start producing progesterone
- stop producing OMIF
- release plasminogen activator
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Term
| When comparing the menstrual cycle to the estrous cycle.... |
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Definition
| the menstrual cycle has a longer follicular phase |
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Term
| In the cellular model proposed for ovulation involving the theca interna and granulose cells, the hormone exerts both paracrine and autocrine effects.... |
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Definition
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Term
| LH maintains luteal progesterone production by.... |
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Definition
- promoting entry of cholesterol into mitochondria
- accelerating LDL-cholesterol receptor internalization
- activating cholesterol-esterase that cleaves the ester from cholesterol
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Term
| The bovine zona pellucida protein regarded as the sperm receptor is... |
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Definition
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Term
| Although a pharmacologic dose of PGF-2alpha can induce luteolysis, it is not regarded as the natural luteolysin in what species |
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Definition
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Term
| Estrogen and progesterone exert antagonistic effects on.... |
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Definition
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Term
| Placing a boar adjacent to a pen of peripubertal gilts to hasten puberty onset is a management strategy developed from this pheromone-induced effect... |
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Definition
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Term
| Processes occuring during estradiol production by the follicle include.... |
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Definition
| stimulation of cholesterol side-chain cleavage enzyme activity by LH |
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Term
| Species that ovulate mature follicles and form functionla CL for a definite period of time ONLY if mating occurs inclue.... |
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Definition
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Term
| If you injected a cow with PGF-2alpha during estrus you would expect to see plasma progesterone concentration... |
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Definition
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Term
| sperm embedded in the zona pellucida are known as... |
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Definition
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Term
| Anti-Mullerian Hormone.... |
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Definition
- Causes regression of the paramesonephic duct
- Inhibits FSH-dependent growth or pre-antral and small antral follicles
- Plasma concentration decline with age
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Term
| One reason why a follicle never ovulates in the luteal phase is because.... |
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Definition
| progesterone inhibits GnRH release |
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Term
| Activin bound to follistatin is.... |
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Definition
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Term
| Proestrus bleeding in the dog is physiologically... |
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Definition
| distinguishable from menses in the primate |
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Term
| What is the reason the surge center does not develop in the male? |
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Definition
| The GnRH surge center does not develope in the male because estradiol converts it into a tonic center |
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Term
| The chemical name for the 17-carbon steroid nucleus is.... |
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Definition
| Cyclopentanoperhydrophenanthrene |
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Term
| The three phases that comprise a follicular wave |
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Definition
recruitment
selection
dominance |
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Term
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Definition
| Inner vs. outer cells fixes blastomere fate |
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Term
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Definition
| Loss of cholesterol from the plasma membrane |
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Term
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Definition
| The oolemma loses ability to engulf sperm |
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Term
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Definition
| Fusion of the plasma membrane and outer acrosomal membrane |
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Term
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Definition
| The ability of an eight-cell embryo to generate eight identical adults |
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Term
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Definition
| Appearance of inner cell mass and trophectoderm |
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Term
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Definition
| Increase in intercellular contacts between blastomeres |
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Term
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Definition
| complete dissolution of the zona pellucida |
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Term
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Definition
| Fusion of male and female pronuclei |
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Term
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Definition
| the Na/K ATPase is expressed here |
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Term
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Definition
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Term
| Karsch-Legan that explains photoperiod regulation of the breeding season in the ewe |
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Definition
| Melatonin influences sensitivity of hypothalamic tonic GnRH center to negative feedback effect of estradiol |
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Term
| Underlying endocrine theme in the transitions from pre-puberty to puberty, anestrus to breeding season, and lactational anestrus to resumption of bestous cycles |
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Definition
Tonic GnRH increases
FSH/LH increase
Increased estradiol
ovulation/cycles start/resume |
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Term
| Describe how progesterone would induce production of endometrial immunosuppressive proteins during pregnancy |
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Definition
- Progesterone
- Diffuses through cell membrane of endometrial cell
- binds to cytosolic receptor
- P4 receptor complex is translocated to the nucleus
- P4- Receptor complex binds to promoters of immunosuppressive protein genes (like a transcription factor)
- Transcription of immunosuppressive protein genes by RNA polymerase II
- Increase immunosuppressive proteins mRNA
- Translation of immunosuppressive proteins mRNA and synthesis of immunosuppressive proteins
- Secretion of immunosuppressive proteins
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Term
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Definition
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