Concentration of which of the following substances will decrease in the maternal blood as it flows from embryo to placenta through the umbilical cord?
i. Oxygen
ii. Amino Acids
iii. Carbon dioxide
iv. Urea
A. i and ii
B. ii and iv
C. iii and iv
D. i and iv
A. i and ii
Explanation:
Oxygen and Amino Acids will decrease in the maternal blood as it flows from embryo to placenta through the umbilical cord
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