Question

Why does the function of the hormone oxytocin in the progression of labor during childbirth illustrate a positive feedback mechanism?
A. Because an increase in oxytocin level decreases the contractions
B. Because an increase in oxytocin level increases the contractions
C. Because an increase in oxytocin level has no effect on the contractions

Answer 1

Only B. illustrates a positive feedback mechanism. A. demonstrates a negative feedback mechanism, while C. demonstrates no feedback mechanism at all.

Answer 2

Answer: The correct answer is -

B. Because an increase in oxytocin level increases the contractions.

Explanation:

A positive feedback occurs when the output enhances or intensifies the original stimulus.

Oxytocin is a hormone and a chemical messenger, called neurotransmitter that is produced by hypothalamus region of the brain. It plays a significant role during labor as it produces uterine contractions, which help in easy expell of baby out of the mother's womb.

An increase in the level of oxytocin results in increased uterine contractions.

Thus, it illustrates a positive feedback mechanism.