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Biology
Homeostasis and response
Puberty and the menstrual cycle
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Created by
Chloe Smith
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Cards (35)
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 mainly responsible for male puberty?
Testosterone
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Where is testosterone produced?
In the
testes
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What does testosterone stimulate in men?
Sperm production
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What hormone is mainly responsible for female puberty?
Estrogen
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Where is estrogen produced?
In the
ovaries
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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 is the average length of a menstrual cycle?
Around
28
days
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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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How long does stage two last?
Around
ten
days
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What is the purpose of the thick spongy layer 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 ovulation last?
One
day
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What occurs during stage four of the menstrual cycle?
The
uterus lining
is maintained
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How long does stage four last?
From
day 14
to
day 28
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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 hormones are involved in the menstrual cycle?
Estrogen
Progesterone
Luteinizing hormone (LH)
Follicle stimulating hormone (FSH)
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What hormone stimulates the uterus lining to grow?
Estrogen
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What role does progesterone play in the menstrual cycle?
Maintains the lining of the
uterus
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What happens if progesterone levels drop?
The
uterus
lining breaks down
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Where are LH and FSH produced?
In the
pituitary gland
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What does FSH stimulate in the ovaries?
One of the
eggs
to
mature
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What does LH stimulate on day 14?
The release of the egg (
ovulation
)
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How do the hormones interact during the menstrual cycle?
FSH
stimulates
estrogen
production
Estrogen inhibits FSH
High estrogen levels stimulate
LH
release
Progesterone
inhibits both LH and FSH
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What happens when estrogen levels are high?
They stimulate the release of
LH
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What does progesterone inhibit?
Both
LH
and
FSH
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What is the outcome if a fertilized egg implants?
The
menstrual cycle
stops
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What is the role of the uterus lining during the menstrual cycle?
It
builds
up
and
breaks
down
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How does the menstrual cycle change if pregnancy occurs?
The
cycle
stops
and
does
not
repeat
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