Template:BGDA Practical 14 - Placental Functions Interactive: Difference between revisions

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 || Incorrect! The difference in oxygen tension in the placenta between the umbilical artery 20 pO<sub>2</sub> (torr) and umbilical vein 30 pO<sub>2</sub> (torr) is therefore about 10 pO<sub>2</sub>(torr). This is significantly less that in the maternal circulation between arterial 100 pO<sub>2</sub>(torr)/venous 55 pO<sub>2</sub> (torr) difference of about 45 pO<sub>2</sub> (torr). See [[:File:Placenta_oxygen_exchange_levels.jpg|image - Placenta oxygen exchange levels]].
+{Which of the following hormones produced by the placenta is important for '''initially''' preserving the pregnancy?
+|type="()"}
++ &nbsp; Human chorionic gonadotrophin
+|| Correct! Human chorionic gonadotrophin (hCG) like leutenizing hormone, initially supports the {{corpus luteum}} in ovary, that produces progesterone to maintain the pregnancy. Later in pregnancy, the placenta takes over the {{corpus luteum}} role.
+- &nbsp; Human chorionic somatommotropin
+|| Incorrect! Human chorionic somatommotropin (hCS) or placental lactogen stimulate (maternal) mammary development rise through pregnancy, stimulates maternal metabolic processes, breast growth. Human chorionic gonadotrophin (hCG) like leutenizing hormone, initially supports the corpus luteum in ovary, that produces progesterone to maintain the pregnancy. Later in pregnancy, the placenta takes over the {{corpus luteum}} role.
+- &nbsp; Human chorionic thyrotropin
+|| Incorrect! Human chorionic gonadotrophin (hCG) like leutenizing hormone, initially supports the corpus luteum in ovary, that produces progesterone to maintain the pregnancy. Later in pregnancy, the placenta takes over the {{corpus luteum}} role.
+- &nbsp; Human chorionic corticotropin
+|| Incorrect! Human chorionic gonadotrophin (hCG) like leutenizing hormone, initially supports the corpus luteum in ovary, that produces progesterone to maintain the pregnancy. Later in pregnancy, the placenta takes over the {{corpus luteum}} role.
+{Which of the following hormones produced by the placenta is important for '''later''' preserving the pregnancy?
+|type="()"}
++ &nbsp; progesterone
+|| Correct! Later in pregnancy, the placenta takes over the {{corpus luteum}} role of progesterone production to preserve the pregnancy.
+- &nbsp; Human chorionic somatommotropin
+|| Incorrect! Later in pregnancy, the placenta takes over the {{corpus luteum}} role of progesterone production to preserve the pregnancy.
+- &nbsp; Human chorionic gonadotrophin
+|| Incorrect! Later in pregnancy, the placenta takes over the {{corpus luteum}} role of progesterone production to preserve the pregnancy.
+- &nbsp; Human chorionic thyrotropin
+|| Incorrect! Later in pregnancy, the placenta takes over the {{corpus luteum}} role of progesterone production to preserve the pregnancy.
+- &nbsp; Follicle Stimulating Hormone
+|| Incorrect! Later in pregnancy, the placenta takes over the {{corpus luteum}} role of progesterone production to preserve the pregnancy.
+- &nbsp; Relaxin
+|| Incorrect! Later in pregnancy, the placenta takes over the {{corpus luteum}} role of progesterone production to preserve the pregnancy.
+{Which of the following options are the roles of placental estrogens.
+|type="[]"}
++ &nbsp; stimulates growth of the maternal uterus myometrium
+|| Correct!
++ &nbsp; antagonizes the maternal uterus myometrial-suppressing activity of other hormones
+|| Correct!
++ &nbsp; stimulates maternal mammary gland ductal growth
+|| Correct!
++ &nbsp; stimulates maternal mammary gland alveolar growth
+|| Correct!
++ &nbsp; stimulates development of female fetal ovary
+|| Correct!
+{The placenta is said to have a "metabolic" role in the synthesis compounds '''except for''':
+|type="[]"}
+- &nbsp; glycogen
+|| Incorrect! glycogen is synthesised by the placenta, {{dehydroepiandrosterone-sulphate}} ({{DHEA-S}}) is produced by the fetal adrenal cortex and is then used by the placenta as estrogen precursors.
++ &nbsp; dehydroepiandrosterone-sulphate
+|| Correct! {{dehydroepiandrosterone-sulphate}} ({{DHEA-S}}) is produced by the fetal adrenal cortex and is then used by the placenta as estrogen precursors.
+- &nbsp; cholesterol
+|| Incorrect! cholesterol is synthesised by the placenta, {{dehydroepiandrosterone-sulphate}} ({{DHEA-S}}) is produced by the fetal adrenal cortex and is then used by the placenta as estrogen precursors.
+- &nbsp; fatty acids
+|| Incorrect! fatty acids are synthesised by the placenta, {{dehydroepiandrosterone-sulphate}} ({{DHEA-S}}) is produced by the fetal adrenal cortex and is then used by the placenta as estrogen precursors.
 </quiz>

Latest revision as of 16:48, 1 June 2019

Placental Functions Interactive Component

Attempt the Quiz - Placental Functions

Here are a few simple Quiz questions that relate to Placental Functions from the practical.

1 The difference in oxygen tension between the umbilical artery and umbilical vein is about:

	100 pO₂ (torr)
	55 pO₂ (torr)
	45 pO₂ (torr)
	10 pO₂ (torr)
	none of the above are correct

2 Which of the following hormones produced by the placenta is important for initially preserving the pregnancy?

	Human chorionic gonadotrophin
	Human chorionic somatommotropin
	Human chorionic thyrotropin
	Human chorionic corticotropin

3 Which of the following hormones produced by the placenta is important for later preserving the pregnancy?

	progesterone
	Human chorionic somatommotropin
	Human chorionic gonadotrophin
	Human chorionic thyrotropin
	Follicle Stimulating Hormone
	Relaxin

4 Which of the following options are the roles of placental estrogens.

	stimulates growth of the maternal uterus myometrium
	antagonizes the maternal uterus myometrial-suppressing activity of other hormones
	stimulates maternal mammary gland ductal growth
	stimulates maternal mammary gland alveolar growth
	stimulates development of female fetal ovary

5 The placenta is said to have a "metabolic" role in the synthesis compounds except for:

	glycogen
	dehydroepiandrosterone-sulphate
	cholesterol
	fatty acids

Additional Information: endocrine placenta