Pituitary Hormones and Their Control by the Hypothalamus

What is the chemical composition of gonadotropin-releasing hormone (GnRH)?

Where are the cell bodies of the neurons that secrete Gonadotropin-Releasing Hormone (GnRH) primarily located?

How is Gonadotropin-Releasing Hormone (GnRH) transported from the hypothalamus to the anterior pituitary gland?

What is the primary function of gonadotropin-releasing hormone (GnRH) released from the hypothalamus?

Which cells in the anterior pituitary gland are responsible for secreting both Luteinizing Hormone (LH) and Follicle-Stimulating Hormone (FSH)?

What is the typical frequency of the intermittent secretion of Gonadotropin-Releasing Hormone (GnRH) in males?

Due to its closer relationship with the secretion of Luteinizing Hormone (LH), what is another widely known name for Gonadotropin-Releasing Hormone (GnRH)?

How does testosterone primarily exert its negative feedback effect to inhibit the secretion of Luteinizing Hormone (LH)?

In the male reproductive system, which cells are responsible for secreting the hormone inhibin?

What is the primary function of the hormone inhibin in the male reproductive hormonal axis?

What happens to the secretion of LH and FSH from the pituitary gland in the complete absence of GnRH secretion from the hypothalamus?

What is the approximate molecular weight range of inhibin, a glycoprotein hormone secreted by the Sertoli cells?

What physiological event marks the beginning of puberty and is caused by a gradual increase in gonadotropic hormone secretion?

Some cases of male hypogonadism are caused by a genetic inability of which organ to secrete normal amounts of GnRH?

What happens to the anterior pituitary's ability to release LH and FSH when GnRH is infused continuously rather than in its natural pulsatile manner?

In females, what is the average frequency of the short pulses of Gonadotropin-Releasing Hormone (GnRH) during the monthly sexual cycle?

During the female ovarian cycle, the early growth of the primary follicle up to the antral stage is stimulated mainly by which hormone?

During the accelerated growth of vesicular follicles, what is the positive feedback effect of estrogen?

Which hormonal event is absolutely necessary for final follicular growth and ovulation to occur?

Approximately how much does the rate of Luteinizing Hormone (LH) secretion by the anterior pituitary increase during the preovulatory surge?

Approximately how many hours before ovulation does the secretion of Luteinizing Hormone (LH) peak?

During the preovulatory surge, how much does the secretion of Follicle-Stimulating Hormone (FSH) increase?

In humans, where in the hypothalamus does the neuronal activity that causes the pulsatile release of GnRH primarily occur?

During most of the female monthly cycle, what is the effect of small amounts of estrogen on the production of LH and FSH?

How does the presence of progesterone alter the negative feedback effect of estrogen on LH and FSH secretion?

In the female reproductive system, what is the source of the hormone inhibin during the luteal phase?

What is the suggested mechanism behind the preovulatory LH surge?

What is the primary reason for an anovulatory cycle, where ovulation does not occur?

What happens to the production of FSH and LH after menopause?

Why is extreme hypersecretion of hormones by the ovaries considered a rare clinical entity, unless a tumor is present?

What is the primary stimulus for the secretion of testosterone by the testes?

What is the main function of Follicle-Stimulating Hormone (FSH) in males?

What is the relationship between the secretion pattern of GnRH and the secretion pattern of LH?

According to the principles of negative feedback, what happens in the male hormonal system when there is too little testosterone?

Which two hormones are described as necessary to initiate spermatogenesis?

What is the status of hypothalamic GnRH secretion during childhood?

What is the primary chemical classification of Luteinizing Hormone (LH) and Follicle-Stimulating Hormone (FSH)?

At the end of the female ovarian cycle, what happens to FSH and LH secretion as a direct result of the sudden cessation of estrogen, progesterone, and inhibin from the involuting corpus luteum?

What specific effect does the preovulatory LH surge have on the granulosa and theca cells?

What is the suggested role of the small but increasing quantities of progesterone secreted by the follicles just before the preovulatory LH surge?

During the luteal phase of the female cycle, what is the effect of the inhibin secreted from the corpus luteum on the anterior pituitary?

At approximately what age does the pituitary gland begin a gradual increase in gonadotropic hormone secretion, leading to puberty in girls?

What is the functional state of the pituitary gland and ovaries during childhood, before puberty?

In the feedback oscillation of the female hormonal system, what event directly causes the pituitary secretion of FSH to begin increasing to start the follicular growth phase?

During the postovulatory (luteal) phase of the cycle, what is the combined feedback effect of progesterone, estrogen, and inhibin secreted by the corpus luteum?

What is the specific term for the cells in the anterior pituitary gland that are the source of the gonadotropic hormones LH and FSH?

What is the currently believed reason that the hypothalamus does not secrete significant quantities of GnRH during childhood?

How does the secretion pattern of FSH in response to pulsatile GnRH differ from that of LH?

In the negative feedback control of testosterone secretion, where does testosterone exert its primary inhibitory effect?

What are the chemical nature and structural size of gonadotropin-releasing hormone (GnRH)?