alleryEstrogen and progesterone, secreted mainly by ovaries during reproductive cycle, are:
APolypeptides
BAmino acid derivatives
CVitamins
DSteroid hormones derived from cholesterol
Answer & Solution
Correct answer: D. Steroid hormones derived from cholesterol
**Estrogen (estradiol) and progesterone:** steroid hormones synthesized from cholesterol in ovaries (theca and granulosa cells).
Cross membranes; bind intracellular receptors
alter gene expression in uterus, breast, bone, brain.
Drive menstrual cycle and pregnancy.
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