Changes happening during adolescence are controlled by ___.

veins

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brain

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hormones

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blood

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Solution

The correct option is C
hormones

Changes that occur during adolescence are controlled by the hormones. Pubic and underarm hair starts to grow and teens go through a growth spurt. When the time comes for changes of puberty to occur, the brain releases gonadotropin-releasing hormone, which targets the pituitary gland.

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(d) The changes occurring in body and mind during adolescence are a natural part of___up.

(e) The features which help us to distinguish between a mature boy and a girl are called___sexual characteristics.

(f) The onset of puberty is controlled by___

(g) Menstrual cycle in women is controlled by___

(h) Each normal body cell in humans contains___pairs of chromosomes out of which___pair is of sex chromosomes.

(i) X and Y chromosomes are called___chromosomes.

(j) Early marriage and motherhood cause health problems in the___and the___

(k) The protective foods are___and___

(l) Thyroid and adrenals secrete their hormones when they receive instructions from___gland through its hormones.

(m) Metamorphosis in amphibians is brought about by___hormone.

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