Term
| The fetal hypothalamus secretes a releasing hormone _____ which stimulates _____ secretion from the fetal pituitary. |
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Definition
| corticotropin-releasing hormone (CRH); adrenocorticotropic hormone (ACTH) |
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Term
| The fetal pituitary secretes greater amounts of _____ near parturition. |
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Definition
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Term
| ACTH causes the fetal adrenal gland to secrete greater quantities of adrenal ______ steroids. |
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Definition
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Term
| Adrenal cortical steroids travel in the ______ _____ to the placenta. |
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Definition
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Term
| In the placenta, the adrenal cortical steroids cause _____ to level off and estrogen and prostaglandin synthesis to ____, making the uterus more excitable. |
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Definition
| progesterone synthesis; increase |
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Term
| The stretching of the uterus produces action potentials that are transmitted to the _____ through ascending pathways. |
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Definition
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Term
| Action potentials stimulate the secretion of ____ from the posterior pituitary. |
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Definition
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Term
| Oxytocin causes the uterine _____ _____ to contract. |
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Definition
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Term
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Definition
-dilation stage
-amnion ruptures
-uterine muscles contract to expel fetus
-thinning of the cervix-effacement
-fetus presses on cervix, causing it to expand to 10 cm |
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Term
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Definition
-strong contractions q 2-3min, lasting 1 min
-expulsion
-ends with birth of baby
-crowning when head appears |
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Term
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Definition
-placental stage
-uterus again begins to contract
-afterbirth delivered
-all placenta fragments must be removed to prevent postpartum bleeding or endometritis |
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Term
| In the newborn, the foramen ovale closes and becomes the ______ ovale. |
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Definition
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Term
| In the newborn, the ductus arteriosus closes and blood no longer flows between pulmonary trunk and aorta. This becomes the... |
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Definition
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Term
| In the newborn, the umbilical vein and arteries.. |
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Definition
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Term
| In the newborn,the ductus venosus is closed, so blood no longer bypasses liver but flows into it. This becomes... |
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Definition
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Term
| Unique vascular modifications seen in prenatal development include 2 umbilical ____ and 1 ___ and three vascular shunts (occluded at birth) |
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Definition
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Term
| 3 vascular shunts include.. |
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Definition
| ductus venosus, foramen ovale, ductus arteriosus |
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Term
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Definition
| venous shunt that bypasses the liver |
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Term
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Definition
| opening in the interatrial septa to bypass pulmonary circulation |
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Term
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Definition
| transfers blood from the right ventricle to the aorta |
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