Which of the following substances can pass th | vedclass

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(B) The placenta acts as a selective barrier between the maternal and foetal blood circulation. Small molecules like oxygen,carbon dioxide,nutrients,a

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Viruses of smallpox

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(B) The placenta acts as a selective barrier between the maternal and foetal blood circulation. Small molecules like oxygen,carbon dioxide,nutrients,antibodies $(IgG)$,and certain viruses can cross the placental barrier. Viruses,such as the smallpox virus,have a low molecular weight compared to large plasma proteins,$WBCs$,and $RBCs$,allowing them to pass through the placental membrane into the foetus. Therefore,the correct option is $(b)$.

Column-$I$	Column-$II$
$A$. $1^{st}$ month	$i$. First movement of foetus
$B$. $2^{nd}$ month	$ii$. Major organ system
$C$. $3^{rd}$ month	$iii$. Foetal heart
$D$. $5^{th}$ month	$iv$. Limbs $\&$ digits

Which of the following substances can pass through the placenta from the mother into the foetus?

Similar Questions

Match the following:

Column-$I$ Column-$II$

$A$. $1^{st}$ month $i$. First movement of foetus

$B$. $2^{nd}$ month $ii$. Major organ system

$C$. $3^{rd}$ month $iii$. Foetal heart

$D$. $5^{th}$ month $iv$. Limbs $\&$ digits

When is the heart formed in a human embryo?

Which of the following hormones is not secreted by the human placenta?

Which one of the following is a temporary endocrine gland?

The foetus is nourished by:

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