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 an egg is released in the human female reproductive system. Controlled by the hormones:
- Follicle-Stimulating Hormone (FSH)
- Luteinising Hormone (LH)
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.
Growth of seedlings
Watch the video and have a go at writing out the steps of the practical.