Question

Foetal ejection reflex in human females is induced by?
A. Differentiation of mammary glands
B. The pressure exerted by amniotic fluid
C. Release of oxytocin from the pituitary
D. The fully developed fetus and placenta

Answer 1

Hint: A female peptide hormone that is released from the pituitary and is helpful in stretching of the uterus.

Complete step-by-step answer:
The Foetal ejection reflex is also called a Ferguson effect which consists of a cycle of uterine contractions which is induced through the pressure at the cervix or the vaginal walls. When the pressure is applied on the cervix, then oxytocin is released which helps in the contraction of the uterus and cervix until the baby is given birth.

Additional Information:
-Oxytocin is generally produced inside the hypothalamus and is released from the posterior pituitary gland.
-This hormone is responsible for social bonding, sexual reproduction, and childbirth.
-It stretches the cervix and the uterus at the time of labor and breastfeeding.
-It is a peptide hormone that is cleaved by the enzymes released from the oxytocin.
-The human has a gene that occurs from the peptide and does coding for the OXT gene.
-This OXT gene is an inactive precursor that breaks the larger substances into smaller fragments through the enzymes.
-It is released in the bloodstream as a hormone which helps in uterine contractions.
So, the correct answer is ‘Release of oxytocin from the pituitary’.

Note: The hormone oxytocin was derived in 1906 by Henry Dale and its molecular structure was described in 1952. It is used as a medicine at the time of childbirth. The female sex hormone estrogen increases the secretion and expression of its receptor in the brain. Estrogen is responsible for the development and regulation of the reproductive system. Estrogen was discovered by an American anatomist and physiologist Edgar Allen.