Reproductive System (slides) Flashcards
How many egg and sperm are fertilized for identical twins?
1 egg, 1 sperm that split
How many egg and sperm cells are involved in the fertilization of fraternal twin fetuses?
2 eggs, 2 sperm
It is the time from the first day of a period to the first day of the next.
Menstrual cycle
It refers to the monthly discharge of blood and endometrial tissue
Menstruation/Period
What is another name for menstruation?
Menses
How long does menstruation usually last?
3-7 days, with 5 being the average
What is the purpose of the menstrual cycle?
To prepare the
body for a possible pregnancy
What is the common menstrual cycle length?
Between 21 to 35 days, with 28 days being the average.
Tre or False: Anything that falls outside the 21-35 day range is considered an irregular period.
TRUE
True or False: Irregular period - could be indicative of an underlying menstrual disorder/
TRUE
What are the phases of the menstrual cycle?
Menstruation Phase
Follicular Phase
Ovulation Phase
Luteal Phase
This phase is the time of the month when the inner layer of the uterus, the endometrium, is shed.
Menstrual phase
What hormone are involved during the menstrual phase and at what concentrations?
Progesterone and Estrogen at their lowest concentrations
.This stage overlaps with menstruation and begins simultaneously
Follicular phase
In this phase, eggs contained within the follicles on the ovaries begin to develop.
Follicular Phase
The follicular phase typically lasts from day ___ to day ___
1; 14
True or False: The follicular phase continues from day 1 until the person undergoes ovulation.
TRUE
What hormones are involved in the follicular phase?
Estrogen and Luteinizing Hormones
What do you call the sacs that contain fluid and premature eggs?
Follicles
On what day does the ovulation phase occur, and how long does it last?
Day 14; lasts for 12-24 hours
The release of the mature egg during the ovulation phase is triggered by what hormone?
Luteinizing Hormones
True or False: The ovulation phase marks the only time conception is possible during the menstrual cycle.
TRUE
What will happen to an egg cell if it is not fertilized?
It will dissolve.
What hormone induced ovulation?
Luteinizing hormone
During what phase of menstruation is estrogen at its highest concentration?
Ovulation period
What hormones are involved during the ovulation period?
Luteinizing hormone, estrogen, and progesterone.
This phase is when the follicle that released the egg transforms into a structure called the corpus luteum.
Luteal phase.
The corpus luteum mainly releases what hormones?
Progesterone and estrogen
What does PMS mean?
Premenstrual syndrome
True or False: PMS begins near the end of the follicular phase before entering menstruation.
FALSE. It occurs during the end of luteal phase.
During what phase is luteinizing hormone at its highest?
Ovulation phase
During what phase is progesterone at its highest concentration?
Luteal phase
It is the chief male reproductive organ.
Testes
It is the temporary storage of immature sperm cells.
Epididymis
It is the hormone that induces formation of follicles.
Follicle stimulating hormone (FSH)