Functions of the Placenta
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Questions and Answers

Which substances are transferred from maternal blood to fetal blood for nutrition?

  • Gases and antibodies
  • Carbon dioxide and waste products
  • Nutrients and electrolytes (correct)
  • Microorganisms and urea

How does the fetus receive oxygen?

  • By diffusion within its own body
  • Through the maternal lungs
  • From the maternal blood across the placental barrier (correct)
  • Through amniotic fluid exchange

Which of the following is NOT a function of the placenta?

  • Gases exchange
  • Nutrient transfer
  • Protection against all microorganisms (correct)
  • Excretion of metabolic wastes

What kind of immunity is provided by the placenta to the fetus?

<p>Passive immunity via antibodies (IgG) (A)</p> Signup and view all the answers

Which waste products are excreted from the fetal blood to the maternal blood via the placenta?

<p>Urea and uric acid (D)</p> Signup and view all the answers

Which function of the placenta is involved in preventing congenital anomalies of the fetus?

<p>Protection (D)</p> Signup and view all the answers

Which substance does NOT commonly pass through the placental barrier as part of the nutrition function?

<p>Antibodies (A)</p> Signup and view all the answers

Which condition is NOT typically transmitted across the placenta?

<p>Diabetes (D)</p> Signup and view all the answers

Which role involves the transfer of carbon dioxide from the fetal blood to the maternal blood?

<p>Gases Exchange (C)</p> Signup and view all the answers

What is a primary outcome of the excretion function of the placenta?

<p>The removal of metabolic waste products from the fetal blood (D)</p> Signup and view all the answers

Study Notes

Placental Functions

  • Oxygen from maternal blood crosses the placental barrier to the fetus, while carbon dioxide from the fetus crosses back to maternal blood
  • The placenta facilitates nutrient exchange:
    • Carbohydrates, fats, proteins, amino acids, vitamins, and minerals from maternal blood are transferred to the fetus
  • Waste products, such as urea and uric acid, are removed from the fetus through the placenta to maternal blood

Immunological Protection

  • The placenta permits the passage of IgG antibodies from maternal blood to fetal blood, providing passive immunity
  • It prevents most microorganisms and drugs from passing from maternal blood to fetal blood

Important Exceptions

  • Certain pathogens, such as poliomyelitis, AIDS, syphilis, and measles, can cross the placental barrier and cause congenital anomalies
  • A few drugs can also cross the barrier, resulting in fetal harm

Placental Functions

  • Oxygen from maternal blood crosses the placental barrier to the fetus, while carbon dioxide from the fetus crosses back to maternal blood
  • The placenta facilitates nutrient exchange:
    • Carbohydrates, fats, proteins, amino acids, vitamins, and minerals from maternal blood are transferred to the fetus
  • Waste products, such as urea and uric acid, are removed from the fetus through the placenta to maternal blood

Immunological Protection

  • The placenta permits the passage of IgG antibodies from maternal blood to fetal blood, providing passive immunity
  • It prevents most microorganisms and drugs from passing from maternal blood to fetal blood

Important Exceptions

  • Certain pathogens, such as poliomyelitis, AIDS, syphilis, and measles, can cross the placental barrier and cause congenital anomalies
  • A few drugs can also cross the barrier, resulting in fetal harm

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Description

This quiz covers the various functions of the placenta, including gas exchange, nutrition, and excretion. Learn about the roles of the placenta in a developing fetus.

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