Fichas
Reproductive Systems - Female reproduction III
Fichas del conjunto (26)
- 1Endometrium development - Menstrual phaseFirst 4 days
Endo. lining of uterus discarded
Bleeding due to ruptured BV in endometrium
Expelled as menstrual fluid - 2Proliferation phaseOestrogen secreted by developing follicle leads to growth + thickening of the endometrium
Uterine glands develop in endo, don't secrete yet - 3Secretory (progestational) phaseC.L. secretes pro + oestradiol
Prog + uterine glands to produce uterine milk - high in pro + glycogen
Provides correct environment should ovum fertilisation occur - 4New menstrual phaseC.L. regresses
no prog/o
endo no longer maintained, necrosis occurs
Expelled w blood as menstrual fluid - 5ImplantationFertilised ovum begins to divide, reaches uterus in 3/4 days
gives time for endom to develop to a suitable state for imp. of developing blastocysts - 6Day 9By day 9 the blast/developing placenta produce human chorionic gondaotrophin (HCG) at high levels for 8 weeks
- 7Function of hCGprevents C.L. from regressing
- 8Egg fertilisedhCG signals CL to continue prog. secretion
- 9False negativehCG drops at 4 months, gives off false negative
Placenta then takes over hCG secretion. - 10PlacentaEndocrine organ
hCG
Progesterone
oESTROGEN
hPL - 11hCGensures continued secretion of progesterone in early pregnancy
- 12ProgesteroneMaintains endometrium
decr. myometrial excitability
Stimulates mammary development - 13OestrogenImportant for build up of uterine muscle + mammary development
- 14hPLHuman placental lactogen
Secreted ~ 10 weeks into gestation
Regulates foetal growth and co-ordinates foetal/maternal metabolism - 15PartuiritionContraction of myometrium sufficiently strong enough to expel foetus
- 16Contractions + by:High O:Prog ratio that occurs towads end of pregnancy
Upregulates OXYTOCIN R in myometrium
Circulating oxytocin can bind + induce muscle contraction - 17(2)Pressure of foetus against cervix
- 18example of?Neuroendocrine reflex
- 19MOA^ Oxytocin secretion from P.P.
Stronger contractions
+FDBCK cycle progressively ^ until cervical dilation + delivery are completed. - 20(3)PFF-2alpha stims uterine contraction
- 21Synthetic oxytocinPitocin
- 22LactationDuring gestation elevated placental O/Prog. promotes development of ducts + alveoli in mammary glands
- 23Prolactinstim. synthesis of enzymes essential for milk production by alveolar epithelial cells
- 24What stim lactation?Withdrawal of placental steroids
(removal of placenta) - 25SucklingSustains lactation
Triggers release of oxy/prolactin
ox = milk ejection
pro = milk synth. - 26Hormone feedback sucklingsuckling
Mechanoreceptors in nipple
Hypothalamus
Nervous pathway / dopamine
P.P. / A.P.
^ Oxytocin / ^ prolactin
contraction / milk synth
Información
- Descripción
- El usuario ha eliminado su información de asignaturas Fichas sobre Reproductive Systems - Female reproduction III, creado por Usuario eliminado el 05/04/2018.
- Creado por
- Usuario eliminado · abr 2018
- Actualizado
- 5 abr 2018
- Visitas
- 13
- Historial
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- Creado por J yadonknow · 5 abr 2018
- Copiado por J yadonknow · 5 abr 2018
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