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Biology
Topic B5
B5- Puberty and the menstrual cycle
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Cards (33)
What is the main focus of today's video?
Reproductive hormones
and the
menstrual cycle
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What is puberty?
The period of developing
secondary sexual characteristics
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What triggers the process of puberty?
Reproductive hormones
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What hormone is primarily responsible for male puberty?
Testosterone
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Where is testosterone produced in men?
In the
testes
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What hormone is primarily responsible for female puberty?
Estrogen
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How many stages are there in the menstrual cycle?
Four
stages
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Where is estrogen produced in women?
In the
ovaries
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What is the average length of a menstrual cycle?
Around
28
days
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What are the four stages of the menstrual cycle?
Menstruation
Uterus lining buildup
Ovulation
Uterus lining maintenance
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What does the red line in the menstrual cycle graph represent?
The thickness of the
uterus lining
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What happens during stage one of the menstrual cycle?
Menstruation
occurs with
bleeding
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How long does menstruation typically last?
About
four
days
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What occurs during stage two of the menstrual cycle?
The
uterus lining
builds up again
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What is the purpose of the thick spongy layer formed in stage two?
To prepare for a
fertilized egg
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What happens during stage three of the menstrual cycle?
Ovulation
occurs with
egg release
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How long does stage three, ovulation, last?
One
day
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What occurs in stage four of the menstrual cycle?
The
uterus lining
is maintained
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What happens if no fertilized egg reaches the uterus?
The uterus
lining
breaks down
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What happens if a fertilized egg implants in the uterus?
The
menstrual cycle
stops
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What hormone stimulates the growth of the uterus lining?
Estrogen
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What hormone maintains the uterus lining during stage four?
Progesterone
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What are the two hormones produced in the ovaries?
Estrogen
and
progesterone
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Where are luteinizing hormone (LH) and follicle stimulating hormone (FSH) produced?
In the
pituitary gland
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What is the role of follicle stimulating hormone (FSH)?
To stimulate
egg
maturation in
ovaries
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What does luteinizing hormone (LH) stimulate?
The release of the egg during
ovulation
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How do the hormones interact during the menstrual cycle?
FSH
stimulates
ovaries
to produce
estrogen
Estrogen inhibits FSH through
negative feedback
High estrogen levels stimulate LH release
Progesterone
inhibits both LH and FSH
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What is the effect of high estrogen levels on FSH?
It
inhibits
FSH
production
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What triggers the LH spike during the menstrual cycle?
High levels of
estrogen
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What happens if progesterone levels drop?
The
uterus
lining breaks down
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What is the final outcome if a fertilized egg implants into the uterus?
The
menstrual cycle
stops
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What is the role of the pituitary gland in the menstrual cycle?
It produces
LH
and
FSH
hormones
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How does the menstrual cycle change if pregnancy occurs?
The
cycle
stops
and
does
not
repeat
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