Placenta Power
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Questions and Answers

By the end of which month of pregnancy in humans, does the foetus develop limbs and digits?

  • 2 months (correct)
  • 1 month
  • 9 months
  • 5 months

When can the first movements of the foetus and appearance of hair on the head be observed in humans?

  • 9 months
  • 1 month
  • 2 months
  • 5 months (correct)

By the end of which trimester in humans, are most of the major organ systems formed?

  • First trimester (correct)
  • Third trimester
  • Second trimester
  • All trimesters

At what stage of pregnancy in humans, is the embryo's heart formed?

<p>1 month (C)</p> Signup and view all the answers

By the end of how many weeks of pregnancy in humans, is the body covered with fine hair, eye-lids separate, and eyelashes formed?

<p>24 weeks (C)</p> Signup and view all the answers

How long does human pregnancy typically last?

<p>9 months (D)</p> Signup and view all the answers

How long does pregnancy typically last in dogs?

<p>3 months (B)</p> Signup and view all the answers

How long does pregnancy typically last in elephants?

<p>18 months (A)</p> Signup and view all the answers

How long does pregnancy typically last in cats?

<p>3 months (D)</p> Signup and view all the answers

By the end of how many months of pregnancy in humans, is the foetus fully developed and ready for delivery?

<p>9 months (C)</p> Signup and view all the answers

During pregnancy, the placenta facilitates the supply of _______ to the embryo.

<p>oxygen and nutrients (C)</p> Signup and view all the answers

Which of the following hormones is NOT produced by the placenta during pregnancy?

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

What is the function of the umbilical cord?

<p>To connect the placenta to the embryo (C)</p> Signup and view all the answers

Which of the following hormones is NOT increased severalfolds in the maternal blood during pregnancy?

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

Which layer of the inner cell mass gives rise to all tissues and organs in adults?

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

What are the finger-like projections on the trophoblast called?

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

What is the structural and functional unit formed by the interdigitation of chorionic villi and uterine tissue?

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

Which hormone is secreted by the ovary during the later phase of pregnancy?

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

Which of the following is NOT a hormone produced by the placenta?

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

What is the role of the placenta as an endocrine tissue?

<p>To produce hormones necessary for supporting fetal growth (D)</p> Signup and view all the answers

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