Q9 - Control of Reproduction Flashcards

1
Q

What are the similarities between LH and prolactin?

A
  • Hormones made by pituitary
  • Made in response to hormones made by the hypothalamus
  • Both can be classed as gonadotropins (only sometimes in the case of prolactin)
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2
Q

What are the differences between LH and prolactin?

A

LH - stimulated by gonadotropin releasing hormone (GRH), acts on thecal and ledyg cells to produce androgens and granulosa cells to stimulate follicular growth and ovulation

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3
Q

Where are LH and prolactin secreted from?

A

Anterior pituitary

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4
Q

What hypothalamic hormones stimulate the secretion of LH and prolactin?

A

LH - gonadotropin releasing hormone (GnRH)

Prolactin - vasoactive intestinal protein (VIP)

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5
Q

What cells does LH act on?

A

Ledyg (male), thacal and granulosa (female) cells

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6
Q

What does LH do?

A

Acts on thecal and ledyg cells to produce androgens, and granulosa cells to stimulate follicular growth and ovulation

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7
Q

What does prolactin do?

A

Inhibits GnRH, stimulates milk production in mammals, and maternal behaviours

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8
Q

What effect does prolactin have on LH?

A

Prolactin inhibits GnRH, which results in less LH production

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