Female Reproductive System Session 22
Supplemental Instruction
Iowa State University / Leader: / Ivy
Course: / AnS 214
Instructor: / Keating
Date: / 3/24/11

OVARIAN CYCLE & OOGENESIS :

1)  Before birth and during childhood, is meiosis active or inactive?

At what point of follicular development does meiosis continue and meiosis I is completed?

2)  What structure develops when a follicle becomes a mature follicle?

3)  What structure develops during the secondary stage of oocyte development?

What are its two most important functions?

4)  Ovulation immediately follows the ______stage. At this time the oocyte has gone from a ______oocyte to a ______oocyte. The oocyte is released into the ______where it awaits ______by sperm.

5)  The ______phase of the ovarian cycle immediately follows ovulation, which occurs after the ______phase. In this phase, because the oocyte is gone, ______cells and ______cells form the ______, or “yellow body.” This structure secretes the hormone ______and to a lesser degree ______. If no pregnancy occurs at this time, this structure ______into the structure called the ______. If pregnancy does occur, however, this yellow body produces ______until the placenta takes over.

UTERINE (MENSTRUAL) CYCLE:

1)  Fill in the table below, indicating the stages and significant events of the uterine cycle:

Stage / Days / Level and type of hormones active / Physiological Changes

2)  Which phase(s) of the uterine cycle occur before ovulation?

After ovulation?

3)  If fertilization does not occur by the end of the secretory phase, what events occur?

4) 
In the diagram below, draw the development of follicles seen during the ovarian cycle, the corresponding changes in hormone levels, and the corresponding changes of the uterine endometrium seen in the uterine cycle. Be sure to include the names of the stages for the cycles:

OVARIAN HORMONES:

1)  Fill in the hormone blanks in the figure at the right:

2)  What hormone begins the cascade of events in the brain-ovary axis?

3)  Identify the direct effect(s) each of the following hormones has within the brain-ovary axis:

GnRH:

FSH:

LH:

Estrogen:

Progesterone:

Inhibin:

TWO CELL MODEL & ESTROGEN:

1)  Name the two cell types important in the two cell model and indicate which pituitary hormone each is affected by:

2)  What is the steroid that is first utilized in the two cell model to synthesis estrogen?

This steroid is then converted to what hormonal forms immediately before being synthesized into estrogen?

3)  What two components is estrogen composed of?

Which of the two is the dominant component?

4)  What are the seven major functions/targets of estradiol discussed in class?

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