B5- Puberty And The Menstrual Cycle Flashcards
What is the monthly release of an egg from a woman’s ovaries called?
The menstrual cycle
The menstrual cycle involves various hormonal changes and stages that prepare the body for potential pregnancy.
What is the main reproductive hormone in men?
Testosterone
Testosterone is produced by the testes and is crucial for sperm production and the development of male secondary sexual characteristics.
What hormone is primarily responsible for female reproductive characteristics?
Estrogen
Estrogen is produced by the ovaries and plays a significant role in the menstrual cycle and physical changes during puberty.
How many stages are there in the menstrual cycle?
Four stages
The four stages involve the breakdown and buildup of the uterine lining, ovulation, and maintenance of the uterine lining.
What happens during Stage 1 of the menstrual cycle?
The lining of the uterus breaks down
This stage marks the start of menstruation, occurring on Day 1.
What occurs during Stage 2 of the menstrual cycle?
The lining of the uterus builds up
This stage occurs from Day 4 to Day 14, where the uterine lining thickens in preparation for a fertilized egg.
What significant event occurs on Day 14 of the menstrual cycle?
Ovulation
An egg is released from the ovary at this stage, marking a key point in the menstrual cycle.
What happens during Stage 3 of the menstrual cycle?
The lining of the uterus is maintained
This stage lasts for about 14 days after ovulation until Day 28.
What triggers the breakdown of the uterine lining on Day 28?
No fertilized egg has landed
If implantation does not occur, the spongy lining begins to break down, restarting the cycle.
What is FSH and where is it produced?
Follicle-Stimulating Hormone, produced in the pituitary gland
FSH causes an egg to mature in the ovaries and stimulates the production of estrogen.
What is the role of LH in the menstrual cycle?
Stimulates the release of an egg at Day 14 (ovulation)
Luteinising Hormone is also produced by the pituitary gland.
What effect does estrogen have on the menstrual cycle?
Causes the lining of the uterus to grow
Estrogen also stimulates the release of LH and inhibits FSH release.
What is the function of progesterone in the menstrual cycle?
Maintains the lining of the uterus during the second half of the cycle
Progesterone is produced after ovulation and helps prepare the uterus for potential pregnancy.
What happens when the level of progesterone falls?
The lining breaks down
This decrease in progesterone leads to menstruation if no fertilized egg has implanted.
True or False: Estrogen inhibits the release of FSH.
True
Estrogen plays a regulatory role in the menstrual cycle by inhibiting certain hormones.
