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Biology Y10 > reproductive system > Flashcards

reproductive system Flashcards

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1
Q

label the diagram of the female reproductive system and state the function of A,B,C and E

A
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2
Q

Gametes differ from normal cells as they contain half the number of chromosomes found in other body cells

True / False

A

True

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3
Q

label the following diagram

A
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4
Q

explain how sperms and female eggs are adapted to its function

A
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5
Q

label the following diagram

A
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6
Q

explain how the placenta is adapted to its function

A
  1. having a large surface area and a thin wall for efficient diffusion
  2. he placenta acts as a barrier to prevent toxins and pathogens getting into the foetus’s blood
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7
Q

Stimulates release of an egg from the ovary (ovulation) in females and testosterone production in males

A

the pituitary gland

Luteinizing hormone (LH)

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8
Q

Stimulates development of an egg follicle in the ovary and oestrogen release from the ovary

A

the pituitary gland

follicle stimulating hormone

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9
Q

Controls sperm production and the development of male secondary sexual characteristics

A

The testes testosterone hormone (TS)

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10
Q

Keeps the uterus lining thickened during the menstrual cycle

A

the ovarieshormone progesterone

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11
Q

Controls the development of female secondary sexual characteristics

A

the ovaries

hormone oestrogen

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12
Q

What causes the uterine lining to break down (menstruation / ‘period’)

A

a fall in progesterone levels

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13
Q

What causes an egg to start maturing in the ovary?

A

the release of FSH (follicle-stimulating hormone) by the pituitary gland

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14
Q

What stimulates the ovaries to start releasing oestrogen?

A

FSH (follicle-stimulating hormone) that is released by the pituitary glan

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15
Q

What causes the uterine wall to start thickening ? and at which day?

what causes the uterine lining to thicken further? and at which day?

what causes the uterine lining to break down (menstruation / ‘period’)? and at which day?

What causes ovulation ? at what day?

A

What causes the uterine wall to start thickening ? and at which day?

Oestrogen - start from day 1 to before day 14

what causes the uterine lining to thicken further? and at which day?

Progesterone start to rise once ovulation has occurred after day 14

what causes the uterine lining to break down (menstruation / ‘period’)? and at which day?

the fall in progesterone levels

What causes ovulation ? at what day?

LH - day 14

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16
Q

What hormones inhibits the FSH and LH production from the pituitary gland ?

A

oestrogen

progesterone

17
Q

What hormone causes the uterine wall to start thickening and the egg to mature?

A

Oestrogen

18
Q

What stimulates the release of LH from the pituitary gland?

A

high levels of oestrogen

19
Q

What causes the progesterone levels to drop?

A

If the ovum is not fertilised, and the corpus luteum breaks down

20
Q

What causes the menstruation?

A

If the ovum is not fertilised, the corpus luteum breaks down and progesterone levels drop, the uterus lining breaks down and is removed through the vagina

21
Q

What happen to progesterone If pregnancy does occur ?

A

the corpus luteum continues to produce progesterone , preventing the uterus lining from breaking down and aborting the pregnancy.

It does this until the placenta has developed, at which point it starts secreting progesterone and continues to do so throughout the pregnancy

22
Q

describe the Interaction between all four of the menstrual cycle hormones

A

The pituitary gland produces FSH which stimulates the development of a follicle in the ovary

An egg develops inside the follicle and the follicle produces the hormone oestrogen

Oestrogen causes growth and repair of the lining of the uterus wall and inhibits production of FSH

When oestrogen rises to a high enough level it stimulates the release of LH from the pituitary gland which causes ovulation (usually around day 14 of the cycle)

The follicle becomes the corpus luteum and starts producing progesterone

Progesterone maintains the uterus lining (the thickness of the uterus wall)

If the ovum is not fertilised, the corpus luteum breaks down and progesterone levels drop

This causes menstruation, where the uterus lining breaks down and is removed through the vagina - commonly known as having a period

If pregnancy does occur the corpus luteum continues to produce progesterone, preventing the uterus lining from breaking down and aborting the pregnancy

It does this until the placenta has developed, at which point it starts secreting progesterone and continues to do so throughout the pregnancy

23
Q

Which hormone trigger follicles to grow?

A

FSH

24
Q

what is Ovulation ?

A

releasing the egg from a fmature ollicle

25
Q

phases

A
26
Q

what do the levels of progesterone start increasing?

A. If the ovum is not fertilised

B. after the day 14 of ovulation when the follicle becomes the corpus luteum

V. when an egg develops inside the follicle

A

B. after the day 14 of ovulation when the follicle becomes the corpus luteum

27
Q

what hormone stimulates the development of a follicle in the ovary?

what hormone causes the which causes ovulation?

A

what hormone stimulates the development of a follicle in the ovary?

FSH

what hormone causes the which causes ovulation?

LH

28
Q

when do the levels of oestrogen start increasing?

A. when an egg develops inside the follicle

B. when the follicle becomes the corpus luteum

C. If the ovum is not fertilised

A

A. when an egg develops inside the follicle

29
Q

What happens to FSH when oestrogen is produced?

A. FSH is inhibited

B. FSH is produced more

A

FSH is inhibited

30
Q

What happens to oestrogen when FSH is released?

A. oestrogen is produced

B. progesterone is produced

C. LH is produced

A

oestrogen is produced

31
Q

what stimulates the progesterone to be produced?

A

when the follicle becomes the corpus luteum

32
Q

what happens when an egg develops inside the follicle?

A. The pituitary gland produces FSH

B. the follicle produces the hormone oestrogen

C. This causes menstruation

D. The pituitary gland produces LH

A

B. the follicle produces the hormone oestrogen

Biology Y10 (11 decks)

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