The placenta can prevent ……..substances in the mother’s blood from reaching the embryo.
a) some useful
b) some harmful
c) both a and b
d) none of these
Which of the following hormone/s is/are secreted by the placenta?
a) estrogen
b) progesterone
c) testosterone
d) both a and b
Explanation: these hormones help in maintaining the pregnancy and prepare the mother for delivery
Which of the following function/s is/are performed by the hormones placenta?
a) maintain the pregnancy
b) prepare the mother for delivery
c) periodically contract the uterus during delivery
d) all of these
What is the position of the head before the birth a few weeks before in the uterus?
a) turned up
b) turned down
c) pushed aside
d) none of these
Explanation: the head turned down just above the cervix
When does the childbirth begin?
a) when the muscular layers of uterus start to contract
b) when the muscular layers of uterus start to relax
c) when the muscular layers of uterus sloughed off
d) both a and b
Explanation: this contraction and relaxation is under the action of oxytocin from posterior pituitary gland
Which of the following event/s occur/s during the childbirth?
a) opening of cervix widens
b) the amniotic sac breaks at some stage of labour
c) the fluid escapes and the baby pushed through the vagina
d) all of these
