Placenta And Some Of IT's Functions

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  • 1/10 Questions

    The stage of labour when the placenta is birthed is known as:

    • First stage of labour
    • Second stage of labour
    • Third stage of labour
    • Fourth stage of labour
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About This Quiz

This is a quiz to test your knowledge about placenta and some it's function and/or update your knowledge.
Enjoy!

Placenta Quizzes & Trivia

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  • 2. 

    Deoxygenated blood from the baby to the placenta is carried by:

    • One umbilical artery

    • Two umbilical arteries

    • One umbilical vein

    • Two umbilical veins

    Correct Answer
    A. Two umbilical arteries
    Explanation
    Just as in pulmonary circulation the de-oxygenated blood is carried by pulmonary arteries from the heart to the lungs the same is true of umbilical arteries - carrying de-oxygenated blood from the baby to the placenta

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  • 3. 

    Oxygenated blood from the placenta to the baby is carried by:

    • One umbilical artery

    • Two umbilical arteries

    • One umbilical vein

    • Two umbilical veins

    Correct Answer
    A. One umbilical vein
    Explanation
    The veins usually carry deoxygenated blood however in pulmonary circulation (Pulmonary veins) and in the umbilical vein it is oxygenated blood that is carried by the vein and de-oxygenated blood by the pulmonary arteries and umbilical arteries.

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  • 4. 

    Which cells of the blastocyst need to invade the endometrium for the placenta to form?

    • Ectoderm

    • Mesoderm

    • Inner cell mass

    • Syncitiotrophoblast

    Correct Answer
    A. Syncitiotrophoblast
    Explanation
    Syncitiotrophoblast is the outer layer of trophoblast that invades the uterine decidua for the placenta to form

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  • 5. 

    The main hormone produced by the placenta that sustains the pregnancy is:

    • Oestrogen

    • Beta Human Chorionic Gonadotrophin

    • Progesterone

    • Human Placental Lactogen

    Correct Answer
    A. Progesterone
    Explanation
    Progesterone is the hormone that ensure the continuation of pregnancy.

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  • 6. 

    The cord should be clamped and cut immediately after the birth of the baby:

    • True as it causes jaundice in the baby always requiring treatment

    • Clamping and cutting the cord is only delayed in preterm infants

    • True as it has no role in adaptation for the baby

    • Delayed clamping & cutting aids with adaptation for the baby

    Correct Answer
    A. Delayed clamping & cutting aids with adaptation for the baby
    Explanation
    Evidence suggests that if the baby is vigorous at birth it may be beneficial to delay cord clamping & cutting until cord has stopped pulsating. See the video clip of Delayed cord clamping under "Video Clips" in Information of this site

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  • 7. 

    The placenta has two membranes - Chorion and the amnion. Which cells are responsible for forming these two membranes?

    • Chorion is formed by the migrating ectoderm from the embryonic disc while amnion is formed by the cytotrophoblast

    • Chorion is formed by the cytotrophoblast while the amnion is formed by the migrating ectoderm from the embryonic disc

    • Both membranes are formed by the cytotrophoblast

    • Both membranes are formed by the migrating ectoderm from the embryonic disc

    Correct Answer
    A. Chorion is formed by the cytotrophoblast while the amnion is formed by the migrating ectoderm from the embryonic disc
    Explanation
    Cytotrophoblast forms the outer membrane the chorion while the migrating ectoderm from the embryonic disc forms the inner amnion

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  • 8. 

    The placenta and the baby evade attack from the mother's immune system by:

    • Producing Neurokinin B from the placenta & Lymphocyte Suppressor cells by the baby

    • Producing Neurokinin B by the baby

    • Producing Lymphocyte suppressor cells by the placenta & the baby

    • Producing Neurokinin B by the placenta & the baby

    Correct Answer
    A. Producing Neurokinin B from the placenta & Lymphocyte Suppressor cells by the baby
    Explanation
    The placenta functions as a major immunological barrier (production of Neurokinin B one example) and the Lymphocyte suppressors are produced by the baby to ensure the pregnancy is not rejected.

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  • 9. 

    The blood flow through the placent at term is:

    • 200-300l/min

    • 400-500l/min

    • 600-700l/min

    • 800-900l/min

    Correct Answer
    A. 600-700l/min
    Explanation
    By term (37-42 weeks of pregnancy) the amount of blood flow in the placenta every minute is 600-700l.

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  • 10. 

    The uterotonic agent that may be used to actively manage the birth of the placenta is:

    • Syntocinon 5IU IV

    • Syntocinon 10IU IV

    • Syntometrine 1ml IV

    • Depends on the woman's preference

    Correct Answer
    A. Syntocinon 5IU IV
    Explanation
    You can use Syntocinon 10IU and Syntometrine 1ml but these should be administered intramuscularly and NOT intravenously. The woman's preference is important in relation to having the uterotonic agent and the route of administration however the decision has been made to actively manage and the only route offered in the response is IV so the safest response is Syntocinon 5IU IV

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  • Current Version
  • Mar 21, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Sep 04, 2012
    Quiz Created by
    Nwaller
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