Sex Hormones Flashcards Preview

Biology year 10 > Sex Hormones > Flashcards

Flashcards in Sex Hormones Deck (19)
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1
Q

Which changes happen to both males and females?

A

Pubic hair grows
Underarm hair grows
Stronger body smell
Increased sex drive and sexual awareness

2
Q

Which changes happen to females only?

A

Breasts develop
Ovaries start to release eggs (and periods start)
Increase in body mass: hips widen

3
Q

Which changes happen to males only?

A
Voice breaks, gets deeper
Testes and penis get bigger
Sperm is produced by testes
Hair grows on face and body
Increase in body mass: body becomes more muscular
4
Q

What is the menstrual cycle?

A

The menstrual cycle in women is a recurring process in which the lining of the uterus (womb) is prepared for pregnancy, and if pregnancy does not happen, the lining is shed atmenstruation (period).

5
Q

What is menstruation?

A

Shedding of the lining of the uterus

6
Q

Menstrual cycle?

A

Changes that happen in the female body over the course of a month

7
Q

Order of the menstrual cycle?

A
  • old egg leaves the boy in menstruation (bleeding as uterus lining is shed)
  • new egg maturing in the ovary
  • egg released
  • womb lining thick and spongy ready to receive new egg
  • egg not fertilised so womb lining breaks down
  • egg leaves body in menstruation
8
Q

FSH = where produced and effect

A

Pituitary gland

Causes an egg to mature in an ovary; stimulates the ovaries to release oestrogen

9
Q

Oestrogen = where produced and effect

A

Ovaries
Stops FSH being produced (so that only one egg matures in a cycle); repairs, thickens and maintains the uterus lining; stimulates the pituitary gland to release LH

10
Q

LH = where produced and effect

A
Pituitary gland
Triggers ovulation (the release of a mature egg)
11
Q

Progesterone = where produced and effect

A

Ovaries

Maintains the lining of the uterus during the middle part of the menstrual cycle and during pregnancy

12
Q

How long is one menstrual cycle?

A

28 days

13
Q

On which day of the menstrual cycle does your period begin?

A

1st

14
Q

On which day of the menstrual cycle is an egg released from the ovary (ovulation)?

A

14

15
Q

What happens to the lining of the uterus if an egg is not fertilised?

A

It breaks down as progesterone concentrations starts to fall

16
Q

Why does a woman not have periods when pregnant?

A

Because progesterone concentration do not start to fall and so the uterus lining does not break down

17
Q

How long does a period usually last in the menstrual cycle?

A

5 days

18
Q

If an egg is released from the left ovary on the 2nd March, when would the next egg be released from the right ovary?

A

30th March

19
Q

If a woman has a period which begins on the 1st January, when will her period begin?

A

29th January