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

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Here are a few simple Quiz questions that relate to Placental Functions from the practical.
 
Here are a few simple Quiz questions that relate to Placental Functions from the practical.
  
++Questions to be updated++
+
<quiz display=simple>
 +
 
 +
{The difference in oxygen tension between the umbilical artery and umbilical vein is about:
 +
|type="()"}
 +
- &nbsp; 100 pO<sub>2</sub> (torr)
 +
|| Incorrect! This is the maternal arterial tension. 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]].
 +
- &nbsp; 55 pO<sub>2</sub> (torr)
 +
|| Incorrect! This is the maternal venous tension. 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]].
 +
- &nbsp; 45 pO<sub>2</sub> (torr)
 +
|| Incorrect! This is the maternal difference in oxygen tension. 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]].
 +
+ &nbsp; 10 pO<sub>2</sub> (torr)
 +
|| Correct! 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]].
 +
- &nbsp; none of the above are correct
 +
|| 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.
  
<quiz display=simple>
 
  
{Which of the following is the most correct statement about the primitive streak:
+
{Which of the following hormones produced by the placenta is important for '''later''' preserving the pregnancy?
 
|type="()"}
 
|type="()"}
- &nbsp; extends from the primitive node to the parachordal plate
+
+ &nbsp; progesterone
- &nbsp; is a primary inducer during organogenesis
+
|| Correct! Later in pregnancy, the placenta takes over the {{corpus luteum}} role of progesterone production to preserve the pregnancy.
+ &nbsp; is a site of migration of epiblast cells to form the mesoderm
+
- &nbsp; Human chorionic somatommotropin
|| The primitive streak is a site of migration of epiblast cells to form firstly endoderm and then the mesoderm.
+
|| Incorrect! Later in pregnancy, the placenta takes over the {{corpus luteum}} role of progesterone production to preserve the pregnancy.
- &nbsp; persists as the parachordal plate
+
- &nbsp; Human chorionic gonadotrophin
- &nbsp; all of the above are correct
+
|| 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>
 
</quiz>
 
<br>
 
<br>
 
{{BGDALabPlacenta}}
 
{{BGDALabPlacenta}}
 +
{|
 +
|-bgcolor="FAF5FF"
 +
|
 +
:[[Template:Med Prac additional Information|'''Additional Information:''']] {{endocrine placenta}}
 +
|}
 
|}<noinclude>[[Category:BGD]][[Category:Template]][[Category:Quiz]][[Category:Endocrine]][[Category:Placenta]]</noinclude>
 
|}<noinclude>[[Category:BGD]][[Category:Template]][[Category:Quiz]][[Category:Endocrine]][[Category:Placenta]]</noinclude>

Latest revision as of 17:48, 1 June 2019

Placental Functions Interactive Component

Attempt the Quiz - Placental Functions  
BGDsmall.jpg

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


BGDsmall.jpg
Practical 14: Implantation and Early Placentation | Villi Development | Maternal Decidua | Cord Development | Placental Functions | Diagnostic Techniques | Abnormalities

Additional Information: endocrine placenta