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C2.1.13 (HL)—Effects of oestradiol and progesterone

Oestradiol and progesterone act through intracellular receptors to regulate gene expression and coordinate reproductive tissue changes, linking signal detection to a specific target-cell response.

Syllabus
First assessment 2025
Objective
C2.1.13
Level
HL

Concept essentials

  • Oestradiol and progesterone are steroid hormones.
  • They bind intracellular receptors in target cells.
  • Their receptor complexes regulate transcription of selected genes.
  • These hormones coordinate reproductive tissue changes and feedback control.
ConceptIB Biology HL