Development of Secondary Sexual Characteristics
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18 Terms
Puberty
Stage when sex hormones trigger physical changes
Secondary sexual characteristics
Physical changes that develop at puberty
Testosterone
Male sex hormone responsible for male secondary characteristics
Oestrogen
Female sex hormone responsible for female secondary characteristics
Growth spurt
Rapid increase in height and size during puberty
What hormone controls male secondary sexual characteristics?
Testosterone
What hormone controls female secondary sexual characteristics?
Oestrogen
What secondary characteristics does testosterone cause?
Facial hair, deeper voice, muscle growth, sperm production
What secondary characteristics does oestrogen cause?
Breast development, wider hips, menstrual cycle begins
What physical change happens in both boys and girls?
Growth spurt
What reproductive change happens in boys at puberty?
Sperm production begins
What reproductive change happens in girls at puberty?
Menstruation begins
Why does the voice deepen in boys?
Larynx enlarges due to testosterone
Why do girls’ hips widen?
To prepare the body for childbirth
Why does hair grow in new places during puberty?
Hormonal stimulation of hair follicles
Which hormone triggers ovulation?
Oestrogen (via LH, Luteinising Hormone)
Which hormone triggers sperm production?
Testosterone
What releases LH (Luteinising Hormone)?
Pituatary gland
