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Oral Histology and Embryology LEC_1

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Questions and Answers

What hormonal changes occur at the onset of puberty in females?

Inhibition of follicle-stimulating hormone (FSH)

Secretion of gonadotropins by the hypothalamus (correct)

Reduction in growth of ovarian follicles

Increased levels of testosterone only

What is the primary role of follicle-stimulating hormone (FSH) during the ovarian cycle?

To stimulate the growth of multiple ovarian follicles (correct)

To regulate the secretion of luteinizing hormone (LH)

To inhibit the growth of follicles

To promote the degeneration of atretic follicles

What typically happens to the follicles that do not reach full maturity during an ovarian cycle?

They produce excess hormones

They remain dormant until the next cycle

They continue to develop into oocytes

They degenerate and become atretic (correct)

What occurs when a follicle becomes atretic?

<p>The oocyte and follicular cells degenerate</p> Signup and view all the answers

Which statement about the ovarian cycle is true?

<p>Only one oocyte is usually discharged per cycle</p> Signup and view all the answers

Study Notes

Hormonal Regulation of Female Reproductive Cycle

At puberty, females experience regular monthly cycles influenced by the hypothalamus.
The hypothalamus secretes gonadotropins, specifically follicle-stimulating hormone (FSH) and luteinizing hormone (LH).
FSH and LH are crucial for stimulating and controlling ovarian changes.

Ovarian Cycle Dynamics

Each ovarian cycle begins with the stimulation of 15 to 20 follicles due to FSH.
Typically, only one follicle matures to release one oocyte; the rest degenerate.
Follicles that do not mature become atretic, meaning the oocyte and follicular cells deteriorate.

Atresia Process

Atretic follicles are replaced by connective tissue after degeneration.
This process ensures resources are concentrated on the maturation of the dominant follicle.

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Description

This quiz covers the essential concepts of oral histology and embryology, focusing on the hormonal regulation of the female reproductive cycle. It discusses the role of hypothalamus and gonadotropins in stimulating follicle maturation and cyclic changes in the ovary. Test your understanding of these important physiological processes.