Which hormone causes male secondary sexual characteristics?
Reveal answer
Testosterone.
Key words: testosterone
4(a) REPRODUCTION · RECALL
4.13 Secondary sexual characteristics
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Which hormone causes female secondary sexual characteristics?
Reveal answer
Oestrogen.
Key words: oestrogen
Name two male secondary sexual characteristics.
Reveal answer
Facial / body hair, deeper voice, more muscle.
Key words: voice
Name two female secondary sexual characteristics.
Reveal answer
Breasts develop, hips widen, menstruation starts.
Key words: breasts
When do secondary sexual characteristics develop?
Reveal answer
At puberty.
Key words: puberty
What is meant by the term puberty?
Reveal answer
Period when hormonal changes produce reproductive maturity and other body changes.
Key words: puberty
What is meant by the term oestrogen?
Reveal answer
Hormone produced mainly by ovaries that supports female reproductive development and cycle control.
Key words: oestrogen
What is meant by the term testosterone?
Reveal answer
Hormone produced mainly by testes that supports male reproductive development and sperm production.
Key words: testosterone
Puberty hormones: for Oestrogen, give the main gonadal source and the typical roles.
Reveal answer
Main gonadal source: Ovaries. Typical roles: Female secondary characteristics; cycle and lining control.
Key words: Oestrogen
Puberty hormones: for Testosterone, give the main gonadal source and the typical roles.
Reveal answer
Main gonadal source: Testes. Typical roles: Male secondary characteristics; supports sperm production.
Key words: Testosterone
Puberty hormones: for Both, give the main gonadal source and the typical roles.
Reveal answer
Main gonadal source: Present in all people at differing concentrations. Typical roles: Act through receptors in multiple tissues.
Key words: Both
Puberty hormones: for Pituitary signals, give the main gonadal source and the typical roles.
Reveal answer
Main gonadal source: Pituitary gland. Typical roles: Stimulate gonadal activity at puberty.
Key words: Pituitary signals
True or false, and why? “Only females have oestrogen and only males have testosterone.”
Reveal answer
False. All people have both, usually at different concentrations and from several tissues.
True or false, and why? “Every person begins puberty at the same age.”
Reveal answer
False. Normal timing varies.
True or false, and why? “A secondary characteristic is required to define a person’s sex or identity.”
Reveal answer
False. These traits vary and are biological responses, not a complete description of an individual.