Human Reproduction Question 68
68. Which one of the following is not the function of placenta? It :
[NEET 2013]
(a) secretes estrogen
(b) facilitates removal of carbon dioxide and waste material from embryo.
(c) secretes oxytocin during parturition
(d) facilitates supply of oxygen and nutrients to embyo
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Answer : c
Hints & Solutions
(c) Function of placenta - The placenta facilitate the supply of oxygen and nutrients to the embryo and also removal of carbon dioxide and excretory/waste materials produced by the embryo. The placenta is connected to the embryo through an umbilical cord which helps in the transport of substances to and from the embryo. Placenta also acts as an endocrine tissue and produces several hormones like human chorionic gonadotropin (hCG), human placental lactogen (hPL), estrogens, progesterone etc.
The umbilical cord is mostly made up of connective tissue known as Wharton’s Jelly and has relatively few cells. The cord has one large umbilical vein and two umbilical arteries. These vessels transport blood to and from the placenta, where exchange between the mother and fetus takes place.
