Prepare for NEET Biology Human Reproduction with MCQs & PYQs on NEET.GUIDE. Access free practice, previous year questions, and expert solutions for reproductive physiology.
In a patient with polycystic ovary syndrome (PCOS), which hormonal imbalance is MOST commonly observed?
Elevated FSH and low LH
Elevated LH and androgens, with relatively low FSH
Low LH and high estrogen
Low FSH and high progesterone
A researcher is studying the hormonal control of spermatogenesis. He administers a drug that selectively blocks the receptors for a specific hormone in the testes. As a result, he observes a significant decrease in the rate of spermatogenesis, but testosterone levels remain normal. Which hormone's receptors are MOST likely being blocked by the drug?
LH
FSH
Testosterone
Inhibin
A pharmaceutical company is developing a new contraceptive pill that specifically targets the LH surge. Which of the following mechanisms would be the MOST effective strategy for this contraceptive?
Inhibiting the positive feedback loop between estrogen and LH
Stimulating progesterone receptors in the hypothalamus
Blocking the release of GnRH from the hypothalamus
Increasing the negative feedback of progesterone on FSH secretion
Which hormone is primarily responsible for the thickening of the uterine lining during the proliferative phase of the menstrual cycle?
Progesterone
Luteinizing Hormone (LH)
Follicle Stimulating Hormone (FSH)
Estrogen
Which hormone is primarily responsible for the thickening of the endometrium during the proliferative phase of the menstrual cycle?
Progesterone
LH
FSH
Estrogen
Which hormone plays a crucial role in facilitating implantation by preparing the uterine endometrium?
Estrogen
LH
FSH
Progesterone
Which of the following statements correctly describes the function of inhibin?
It selectively inhibits the secretion of FSH.
It stimulates the secretion of both FSH and LH.
It selectively inhibits the secretion of LH.
It stimulates the secretion of GnRH.
Which hormone's secretion is NOT significantly affected by inhibin?
FSH
LH
GnRH
Progesterone
