Question

What happens when oxytocin is released during activation of the neurohumoral
reflex?
A. it aids in milk production from myoepithelial cells in the breast
B. it activates a positive feedback circuit by which each subsequent sensory stimulus
produces a greater release of the hormone
C. it occurs due activation of supraoptic nucleus neurons that make synaptic contacts in
the anterior pituitary
D. it is due to activation of basomedial hypothalamic neurons

Answer 1

Answer ; B) It activates a positive feedback circuit by which each subsequent sensory stimulus produce a greater release of the hormone.

Reason ; In the given statement, the passage refers the oxytocin hormone and the neurohumoral reflex. While the oxytocin released certain postive type of feedback mechanism will formed as like mentioned in the above mentioned statement. hence the above mentioned option explain the actual physiology of this hormone.

This hormone doesn't deal with the milk production but it help in the ejection feature, option A talks about the hormone prolactin and not about the oxytocin. Hence the option A is incorrect. This hormone has relation with posterior pituitarey and not with the anterior one, and it is related to the paraventricular nucleus and not with the supraoptic or basomedial neurons. Hence other two option would also be the incorrect one.