Biology 0610 · IGCSE · Sex hormones in humans

Sex hormones in humans — practice question

The diagram illustrates a human menstrual cycle. What do X, Y and Z represent?

  • AX: the lining of the uterus is breaking down; Y: an ovary releases an egg; Z: a thick uterus lining is maintained
  • BX: the lining of the uterus is breaking down; Y: a thick uterus lining is maintained; Z: an ovary releases an egg
  • CX: a thick uterus lining is maintained; Y: an ovary releases an egg; Z: the lining of the uterus is breaking down
  • DX: a thick uterus lining is maintained; Y: the lining of the uterus is breaking down; Z: an ovary releases an egg

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