HTHSCI 2H03 Lecture Notes - Lecture 8: Breastfeeding, Vascular Smooth Muscle, Glucocorticoid
2 May 2016
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Requires the release of calcium from the sarcoplasmic reticulum in smooth muscle cells. Initiated by the stimulation of: gi protein coupled receptors inhibits the activity of adenyl cyclase and the conversion of. Initiated by the inhibition of: gs protein coupled receptors inhibits the activity of adenyl cyclase (same cascade as above) The placenta and mother"s posterior pituitary due to uterine stretching. As the baby gets larger, stretching of the uterine muscle induces the release of estrogen. Estrogen induces oxytocin receptors on the uterus initiates a positive feedback loop. Stimulates the release of oxytocin from the placenta and the mother"s posterior pituitary. Posterior pituitary due to suckling of the newborn: suckling stimulates nerves in the breast, nerve impulses sent to the hypothalamus, hypothalamus sends impulse to the posterior pituitary, posterior pituitary releases oxytocin. Increases the frequency and force of uterine contractions. Stimulates the placenta to make prostaglandins stimulate more vigerous contractions of the uterus.
