Module 4

Question 1

How is photoperiodic info transduced?

Answer 1

Melatonin concentrations are regulated

Question 2

What triggers melatonin production

Answer 2

darkness

Question 3

What triggers increase in sex steroid hormone?

Answer 3

Increase in day length

Question 4

What halts melatonin production

Answer 4

pineal gland sensing light

Question 5

Long nights or short nights make more melatonin?

Answer 5

Long nights

Question 6

what do gonads synthesise

Answer 6

sex steroid hormones

Question 7

Why photoperiod cue for seasonal changes for reproduction?

Answer 7

Photoperiod: It’s reliable, nothing’s gonna change it

Question 8

what does the anterior pituitary gland synthesize

Answer 8

LH and FSH

Question 9

What does the hypothalamus synthesize

Answer 9

GnRH

Question 10

If melatonin is present, what happens to sex steroid hormones

Answer 10

it inhibits GnRH release or responsiveness, which would then affect the rest of the cascade and decrease the amount of sex steroid hormone production