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Karnataka Board PUCPUC Science 2nd PUC Class 12

A human female experiences two major changes, menarche and menopause during her life. Mention the significance of both the events. - Biology

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Questions

A human female experiences two major changes, menarche and menopause during her life. Mention the significance of both the events.

Women experiences two major events in their life time one at menarche and the second at menopause. Mention the characteristics of both the events.

Short Answer
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Solution

Menarche: 

  • It is the first menstrual flow in a girl’s life.
  • Occurs between age 11 to 13 years.
  • Marks the beginning of reproductive phase.
  • Indicates onset of puberty and ovulation begins.

Menopause: 

  • It is the permanent cessation of menstrual cycles.
  • Occurs between age 45 to 50 years.
  • Ovarian follicles stop responding to pituitary hormones.
  • Ovulation and menstruation cease; fertility ends.
  • Estrogen levels fall, causing physical and psychological changes.
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Chapter 3: Human Reproduction - SHORT ANSWER [Page 22]

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NCERT Exemplar Biology [English] Class 12
Chapter 3 Human Reproduction
SHORT ANSWER | Q 1. | Page 22
Nootan Biology [English] Class 12 ISC
Chapter 3 Human Reproduction
TEST YOUR PROGRESS | Q 8. | Page 114

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