Oxytocin is a cyclic peptide containing 9 amino acid residues. In its molecule, we find several amide groups (-CONH), which were formed through peptide bonds between amino acids. It is produced in the paraventricular nuclei of the hypothalamus by the magnocellular neurons but is released only in the neurohypophysis. Oxytocin is a fundamental importance in birth labor and the ejection of milk. Oxytocin acts on labor by stimulating uterine contractions, as well as dilating the vaginal canal and distancing the pubic symphysis. The suction promoted by the babies in the halo of the mother's breast also promotes the release of oxytocin, whose function is to help in the secretion of milk.
Answer : Option B) Cell theory has been unchanged for many decades and as a result can be accepted as fact.
Explanation : As cells are basic units of life and all the living beings are made up of cells, this was correctly defined by the cell theory. This theory is since its discovery not changed for many decades and is widely accepted as a fact too.
