IBSS 1540 Exam 3 Questions with Correct Answers 100% Verified By Experts| Latest Update
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When during a female's life will her primary oocytes be in meiotic arrest? from the 4th/5th
month of gestation up until puberty
When is the first meiotic division in female germ cells completed? at ovulation
What is the end product of mitotic steps in female gametogenesis? primary oocytes
What is the name of an oocyte that has completed its first meiotic division? secondary
oocyte
When does the second meiotic division in female gametes occur? after fertilization
What is true of the two daughter cells of the meiotic divisions in female gametogenesis? it
forms one large cell, and one small polar body
In oogenesis, does mitosis begin before or after fertilization? before
In oogenesis, does meiosis begin before or after fertilization? meiosis I begins before, and
meiosis II is completed after fertilization
At which follicular stage can pre-prubsecent girls reach? the preantral stage
How many follicles in the ovary develop at one time? many cells in one large group all
undergo the process together
What forms the fluid that accumulates in antral cfollicles? What is its function? this fluid is
rich in nutrients and is formed by the granuloma cells of the follicle
,Why can pre-pubescent girls only reach the preantral stage in follicular development?
because hormones like GnRH, FSH, LH, and estrogen are needed to develop the antral cell,
and these hormones are not synthesized until puberty
What happens to the number of a woman's follicles with age? Why? they decrease from
several million to less than a thousand over their lifespan due to apoptosis
What is the role of atresia in the female reproductive system? this is a form of apoptosis
that results in a dramatic decrease in reserves of follicles in females as they age
What is true of the presence of follicles in a female fetus? they contain several million
follicles
How many follicles get ovulated over the course of a woman's life? 400-450
What is the relationship between presence of follicles and menopause? at 50 years old,
when menopause begins, there are very few follicles remaining, which impairs fertility
How many phases are there in the menstrual cycle? What are they? follicular phase,
ovulatory phase, and luteal phase
What is the first day of the menstrual cycle? the first day of menstruation
Which hormone dominates the follicular phase of the menstrual cycle? estrogen
How long does the follicular phase of the menstrual cycle last? 2 weeks
,What happens from days 1-7 in the follicular phase of the menstrual cycle? secondary
follicles are converted into antral follicles by estrogen
What is the role of FSH in the follicular phase in the menstrual cycle? it enables secondary
follicles to be converted to antral ones through the secretion of estrogen
What occurs at day 7 in the follicular phase of the menstrual cycle? there is a selection of
one dominant antral follicle and death of most other cells in the cohort
What occurs from day 7-14 in the follicular phase of the menstrual cycle? the dominant
antral follicle develops and secretes lots of estrogen
What is the role of LH in the ovulatory phase of the menstrual cycle? there is an LH surge
here that triggers the final menstruation of the Graafian follicle and causes ovulation
At which day of the menstrual cycle does the ovulatory phase occur? 15
What hormone dominates the luteal phase of the menstrual cycle? progesterone, although
estrogen is still present
What occurs from days 16-25 in the luteal phase of the menstrual cycle? the Graafian follicle
becomes a corpus luteum and secretes progesterone and estrogen
What occurs at day 15 in the luteal phase of the menstrual cycle? the corpus luteum
degrades
Via what process does the corpus luteum degrade? What is the effect? it occurs via
luteolysis, which inhibits the release of hormones from this structure
, What occurs during the 25-28 days of the luteal phase of the menstrual cycle? there is a
decrease in progesterone and estrogen levels, resulting in sloughing of the endometrium
preparing for menstruation
What are the three phases of the menstrual cycle in regards to the events of the endometrium?
menstrual phase, proliferative phase, and secretory phase
When does the menstrual phase of the menstrual cycle occur? from days 1-5
What phase occurs after the menstrual phase in the menstrual cycle? the proliferative phase
What phase occurs after the proliferative phase in the menstrual cycle? the secretory phase
What occurs in the proliferative phase of the menstrual cycle? estrogen stimulates growth
of the endometrial wall
What occurs in the secretory phase of the menstrual cycle? progesterone stimulates
endometrial glands and causes nutrients to be released
Which three hormones can provide negative feedback to the anterior pitutiary in the hormonal
control of the menstrual cycle? estrogen, progesterone, and inhibin
Which two hormones can provide negative feedback to the hypothalamus in the hormonal
control of the menstrual cycle? estrogen and progesteron
What is the role of kisspeptin secreting nuclei in the hormonal control of the menstrual cycle?
the kisspeptin dictates the pulsatile secretion of GnRH from the hypothalamus
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When during a female's life will her primary oocytes be in meiotic arrest? from the 4th/5th
month of gestation up until puberty
When is the first meiotic division in female germ cells completed? at ovulation
What is the end product of mitotic steps in female gametogenesis? primary oocytes
What is the name of an oocyte that has completed its first meiotic division? secondary
oocyte
When does the second meiotic division in female gametes occur? after fertilization
What is true of the two daughter cells of the meiotic divisions in female gametogenesis? it
forms one large cell, and one small polar body
In oogenesis, does mitosis begin before or after fertilization? before
In oogenesis, does meiosis begin before or after fertilization? meiosis I begins before, and
meiosis II is completed after fertilization
At which follicular stage can pre-prubsecent girls reach? the preantral stage
How many follicles in the ovary develop at one time? many cells in one large group all
undergo the process together
What forms the fluid that accumulates in antral cfollicles? What is its function? this fluid is
rich in nutrients and is formed by the granuloma cells of the follicle
,Why can pre-pubescent girls only reach the preantral stage in follicular development?
because hormones like GnRH, FSH, LH, and estrogen are needed to develop the antral cell,
and these hormones are not synthesized until puberty
What happens to the number of a woman's follicles with age? Why? they decrease from
several million to less than a thousand over their lifespan due to apoptosis
What is the role of atresia in the female reproductive system? this is a form of apoptosis
that results in a dramatic decrease in reserves of follicles in females as they age
What is true of the presence of follicles in a female fetus? they contain several million
follicles
How many follicles get ovulated over the course of a woman's life? 400-450
What is the relationship between presence of follicles and menopause? at 50 years old,
when menopause begins, there are very few follicles remaining, which impairs fertility
How many phases are there in the menstrual cycle? What are they? follicular phase,
ovulatory phase, and luteal phase
What is the first day of the menstrual cycle? the first day of menstruation
Which hormone dominates the follicular phase of the menstrual cycle? estrogen
How long does the follicular phase of the menstrual cycle last? 2 weeks
,What happens from days 1-7 in the follicular phase of the menstrual cycle? secondary
follicles are converted into antral follicles by estrogen
What is the role of FSH in the follicular phase in the menstrual cycle? it enables secondary
follicles to be converted to antral ones through the secretion of estrogen
What occurs at day 7 in the follicular phase of the menstrual cycle? there is a selection of
one dominant antral follicle and death of most other cells in the cohort
What occurs from day 7-14 in the follicular phase of the menstrual cycle? the dominant
antral follicle develops and secretes lots of estrogen
What is the role of LH in the ovulatory phase of the menstrual cycle? there is an LH surge
here that triggers the final menstruation of the Graafian follicle and causes ovulation
At which day of the menstrual cycle does the ovulatory phase occur? 15
What hormone dominates the luteal phase of the menstrual cycle? progesterone, although
estrogen is still present
What occurs from days 16-25 in the luteal phase of the menstrual cycle? the Graafian follicle
becomes a corpus luteum and secretes progesterone and estrogen
What occurs at day 15 in the luteal phase of the menstrual cycle? the corpus luteum
degrades
Via what process does the corpus luteum degrade? What is the effect? it occurs via
luteolysis, which inhibits the release of hormones from this structure
, What occurs during the 25-28 days of the luteal phase of the menstrual cycle? there is a
decrease in progesterone and estrogen levels, resulting in sloughing of the endometrium
preparing for menstruation
What are the three phases of the menstrual cycle in regards to the events of the endometrium?
menstrual phase, proliferative phase, and secretory phase
When does the menstrual phase of the menstrual cycle occur? from days 1-5
What phase occurs after the menstrual phase in the menstrual cycle? the proliferative phase
What phase occurs after the proliferative phase in the menstrual cycle? the secretory phase
What occurs in the proliferative phase of the menstrual cycle? estrogen stimulates growth
of the endometrial wall
What occurs in the secretory phase of the menstrual cycle? progesterone stimulates
endometrial glands and causes nutrients to be released
Which three hormones can provide negative feedback to the anterior pitutiary in the hormonal
control of the menstrual cycle? estrogen, progesterone, and inhibin
Which two hormones can provide negative feedback to the hypothalamus in the hormonal
control of the menstrual cycle? estrogen and progesteron
What is the role of kisspeptin secreting nuclei in the hormonal control of the menstrual cycle?
the kisspeptin dictates the pulsatile secretion of GnRH from the hypothalamus
