Saturday, 23 February 2013

3.12 understand the roles of oestrogen and testosterone in the development of secondary sexual characteristics.

Secondary sexual characteristics develop during puberty

Oestrogen- females
The beginning of the menstrual cycle
Body mass increases and redistributed- to hips and breasts
Body hair- pubic
Voice deepens slowly
Development of sexual organs

Testosterone- males
Production of sperm
Growth of sexual organs
Body hair- pubic, arms and face
Body mass will increase, including muscle mass
Voice breaks (becomes deeper)
Development of a sexual drive
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6 comments:

  1. mind.it8 November 2016 at 05:19

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  2. annonymos25 November 2016 at 11:39

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    ReplyDelete
  3. Mike Tsang26 June 2017 at 03:29

    The Biology Syllabus has changed…

    Here is a New blog for the 2017 Syllabus:

    http://igcse-biology-2017.blogspot.hk

    ReplyDelete
  4. SophieRice26 June 2017 at 18:54

    more at

    http://igcse-biology-notes.blogspot.hk/2017/06/312-understand-roles-of-oestrogen-and.html

    ReplyDelete
  5. John_Smith1 June 2018 at 08:36

    This blog i great but I would love it if you could update the syllabus bullet points as it will make it so much easier to navigate the page. Thanks for the page though!

    ReplyDelete
  6. CLASH OF CLANS bases24 May 2019 at 10:25

    Penis enlarges?

    ReplyDelete

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