IB Biology HL D3.1.13 Hl Puberty Control Questions

Trace hypothalamic GnRH to pituitary FSH and LH release, then link oestradiol and testosterone to primary and secondary sexual development.

Exam points

Explain how hypothalamic GnRH triggers pituitary LH release and how LH increases sex-hormone production during puberty.

[Maximum number: 1]

What controls the developmental changes during puberty?

I. Increased release of gonadotropin-releasing hormone (GnRH) by the hypothalamus
II. Luteinizing hormone (LH) leading to increased sex hormone production
III. Gonadotropin-releasing hormone (GnRH) triggering the onset of increased luteinizing hormone (LH)

I and II only

I and III only

II and III only

I, II and III

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IB Biology HL D3.1.13 Hl Puberty Control Questions question 1