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Higher Human Biology > Unit 2 - KA2 (Hormonal control of reproduction) > Flashcards

Unit 2 - KA2 (Hormonal control of reproduction) Flashcards

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1
Q

When does the Hypothalamus secrete a releaser hormone which targets the pituitary gland?

A

During Puberty

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2
Q

What are the three pituitary hormones that are released during puberty?

A

Follicle stimulating hormone (FSH)
Lutenising Hormone (LH)
Interstitial cell stimulating hormone (ICSH)

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3
Q

What sex release Follicle stimulating hormones (FSH)?

A

Male and Females

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4
Q

What sex releases Lutenising Hormones (LH)?

A

Females

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5
Q

What sex releases Interstitial cell stimulating hormones (ICSH)?

A

Males

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6
Q

What triggers the onset of puberty?

A

The release of pituitary hormones

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7
Q

What are FSH and ICSH secreted by?

A

Pituitary Gland

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8
Q

What is the target of FSH?

A

Seminiferous tubules

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9
Q

What is the target of ICSH?

A

Interstitial cells of the testes

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10
Q

What effect does FSH have?

A

Promotes sperm production

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11
Q

What effect does ICSH have?

A

Stimulates production of testosterone

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12
Q

What is testosterone secreted by?

A

Interstitial cells of the testes

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13
Q

What is the target of testosterone?

A

Semiferous tubles and accessory glands

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14
Q

What is the effect of testosterone?

A

Stimulates sperm production

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15
Q

How long does the average menstrual cycle last?

A

28 days

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16
Q

What are the two phases of the menstrual cycle?

A

Stage 1: Follicular phase
Stage 2: Luteal Phase

17
Q

During the first phase of the menstrual cycle what does the pituitary gland release?

A

FSH

18
Q

What two effects does FSH have?

A
  • Stimulates the development and maturation of a follicle in the ovary.
  • Stimulates the wall of the follicle and the ovarian tissue to secrete the hormone oestrogen.
19
Q

What is the immediate effect of oestrogen?

A

To bring about the repair and proliferation of the endometrium (uterine wall).

20
Q

What does peak levels of oestrogen do?

A

Stops the pituitary producing FSH and stimulates it to produce a surge in the secretion of LH

21
Q

What does a surge of LH trigger?

A

Ovulation

22
Q

What is ovulation and when does it occur?

A

Ovulation is the release of an ovum and occurs about day 14 of the menstrual cycle.

23
Q

What do high oestrogen levels affect?

A

The consistency of the cervical mucus, it thins it meaning it is more easily penetrated by sperm and leads to an increased chance of fertilisation.

24
Q

What does the corpus luteum secrete?

A

A hormone called progesterone

Higher Human Biology (12 decks)

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