Hormonal coordination
Key Words
Hormones – chemical molecules released directly into the blood. They control things in organs and cells that need constant adjustment. They react slowly, for a long time and in a general way.
Glands – where hormones are produced.
Endocrine system – the group of glands in our body.
Nerves – connections to our nervous system. They react fast, for a short time and in a precise area.
Diabetes – a condition that affects your ability to control your blood sugar level.
Puberty – the body starts releasing sex hormones which trigger changes in the body.
Menstual cycle – 28 day cycle where┬á an egg is released in the human female reproductive system. Controlled by the hormones:
- Follicle-Stimulating Hormone (FSH)
- Oestrogen
- Luteinising Hormone (LH)
- Progesterone
Pregnancy – when a sperm reaches an ovulated egg.
Contraception – stops the sperm reaching an ovulated egg.
IVF – fertilising and egg with sperm in a lab.
Fertility – the natural capability of being able to produce children.
Adrenaline – a hormone realeased by the adrenal glands in response to stressful or scary situations.
Thyroxine – a hormone released by the thyroid gland that regulates the basal metabolic rate.
Basal metabolic rate – the speed at which chemical reactions in the body occur while the body is at rest.
Auxin – a plant hormone that controls growth near the tips of shoots and roots.
Gibberellin – a plant hormone that stimulates seed germination, stem growth and flowering.
Ethene – a gas produced by aging parts of a plant. It influences the growth of a plant and stimulates enzymes that cause fruit to ripen.
Also see Homeostasis, Reproduction
PRACTICAL
Growth of seedlings
Watch the video and have a go at writing out the steps of the practical.
Links for Learning
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Bitesize: Hormones
Bitesize: The human endocrine system
Revision World: Hormones
Bitesize: Hormones in human reproduction
Bitesize: Plant hormones
Bitesize: The human endocrine system test
Bitesize: Hormones in human reproduction test
Bitesize: Plant hormones test
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