Which of the following ovarian hormone is involved in a positive feedback loop with hypothalamus and the anterior pituitary?

Oxytocin

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Luteinizing hormone

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Progesterone

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Gonadotropin releasing hormone

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Solution

The correct option is A Oxytocin
Positive feedback occurs when the rate of the process increases as the concentration of the product increase. Positive feedback systems reinforce (increases) changes in the controlled condition. Oxytocin regulation is the example of positive feedback control. When oxytocin is released it stimulates the uterus contraction. When more contraction of the uterus occurs more oxytocin is released. Thus, the correct answer is option A.

Suggest Corrections

Column I	Column II
A. Hypothalamus	(i) Relaxin
B. Anterior pituitary	(ii) Progesterone
C. Testis	(iii) FSH and LH
D. Ovary	(iv) Androgen
	(v) Gonadotropin releasing hormone