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Question 18M.2.HL.TZ1.b

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Date May 2018 Marks available [Maximum mark: 4] Reference code 18M.2.HL.TZ1.b
Level HL Paper 2 Time zone TZ1
Command term Outline Question number b Adapted from N/A
b.
[Maximum mark: 4]
18M.2.HL.TZ1.b

Outline the roles of estrogen and progesterone in females during human reproduction.

[4]

Markscheme

a. estrogen/progesterone for repair/thickening/development/vascularisation of uterus lining/endometrium 

b. estrogen (at high levels) stimulates LH secretion (which stimulates ovulation)

c. progesterone maintains the uterus lining/endometrium during pregnancy/prevents miscarriage 

d. progesterone/estrogen inhibits FSH/LH secretion 

e. progesterone for development of breast tissue during pregnancy 

f. fall in progesterone/rise in estrogen leads to labour/contractions/childbirth 

g. estrogen/progesterone cause pre-natal development of female reproductive organs
OR 
h. estrogen/progesterone cause secondary sexual characteristics

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