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AQASpec 4.5.3Foundation & Higher~30 min

Hormones & Human Reproduction

Biology · Topic revision workspace

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Read the notes, score 80% and know 75% of the cards.

Topic overview

What you need to know

Hormones & Human Reproduction is a key part of GCSE Biology. Connect structures to their functions and explain biological processes as clear causal sequences. A chemical messenger produced by endocrine glands, transported in the blood to target organs where it causes a response. The system of glands that produce hormones: pituitary, thyroid, adrenal, pancreas, ovaries, testes. The 'master gland' in the brain that secretes hormones controlling other glands, including FSH and LH.

Exam tip

Use precise scientific vocabulary and make each link in an explanation explicit.

Revision notes

Core ideas

Secure these ideas first. Say each definition in your own words, then connect it to the topic overview.

  • Hormone: A chemical messenger produced by endocrine glands, transported in the blood to target organs where it causes a response.
  • Endocrine System: The system of glands that produce hormones: pituitary, thyroid, adrenal, pancreas, ovaries, testes.
  • Pituitary Gland: The 'master gland' in the brain that secretes hormones controlling other glands, including FSH and LH.
  • Oestrogen: A hormone produced by the ovaries that controls female secondary sexual characteristics and helps regulate the menstrual cycle.

Revision notes

Apply it in the exam

The exam will rarely ask for an isolated definition. Practise selecting the right idea and using it as part of a complete explanation or method.

  • Testosterone: The main male sex hormone produced by the testes. Controls male secondary sexual characteristics and sperm production.
  • Menstrual Cycle: A ~28-day cycle controlled by FSH, LH, oestrogen, and progesterone. Involves egg maturation, ovulation, and uterus lining changes.
  • Contraception: Methods to prevent pregnancy: hormonal (pill, implant), barrier (condom), surgical (sterilisation), or IUD.
  • IVF (In Vitro Fertilisation): A fertility treatment: FSH and LH stimulate egg production, eggs are collected, fertilised with sperm in a dish, then embryos are implanted.

Core knowledge

Key facts for Hormones & Human Reproduction

1

Hormone

A chemical messenger produced by endocrine glands, transported in the blood to target organs where it causes a response.

2

Endocrine System

The system of glands that produce hormones: pituitary, thyroid, adrenal, pancreas, ovaries, testes.

3

Pituitary Gland

The 'master gland' in the brain that secretes hormones controlling other glands, including FSH and LH.

4

Oestrogen

A hormone produced by the ovaries that controls female secondary sexual characteristics and helps regulate the menstrual cycle.

5

Testosterone

The main male sex hormone produced by the testes. Controls male secondary sexual characteristics and sperm production.

6

Menstrual Cycle

A ~28-day cycle controlled by FSH, LH, oestrogen, and progesterone. Involves egg maturation, ovulation, and uterus lining changes.

7

Contraception

Methods to prevent pregnancy: hormonal (pill, implant), barrier (condom), surgical (sterilisation), or IUD.

8

IVF (In Vitro Fertilisation)

A fertility treatment: FSH and LH stimulate egg production, eggs are collected, fertilised with sperm in a dish, then embryos are implanted.

Active recall

Close the notes and answer these

  1. 1.Without looking, explain hormone and give one example or consequence.
  2. 2.Without looking, explain endocrine system and give one example or consequence.
  3. 3.Without looking, explain pituitary gland and give one example or consequence.
  4. 4.Without looking, explain oestrogen and give one example or consequence.

Content reviewed 23 July 2026 against the current linked specification.

Finished learning?

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