Question

MD01c [Feb00] Oxytocin:

A. Ringed octapeptide
B. Effects on uterus antagonized by beta antagonists C. ADH like effect
D. Bolus dose will increase central venous pressure
E. Synthetised in posterior pituitary

Answer 1

Oxytocin is a hormone secreted by the pituitary gland that stimulates uterine contractions during childbirth, with its levels rising via a positive feedback loop. It is synthesized in the hypothalamus and stored in the posterior pituitary before release.

Step-by-step explanation:

Oxytocin is an endocrine hormone secreted by the pituitary gland that plays a crucial role during childbirth to stimulate uterine contractions. Contractions increase in intensity as blood levels of oxytocin rise via a positive feedback mechanism until the birth is complete. The posterior pituitary gland is involved in the secretion of oxytocin, but it is not where the hormone is synthesized. Instead, oxytocin is synthesized in the hypothalamus and stored in the posterior pituitary gland before being released into the bloodstream.