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Brainlag Learn / GCSE Biology

Homeostasis and response

How the nervous and hormonal systems keep the body's internal conditions steady: reflexes and reaction time, blood glucose and diabetes, reproductive hormones and contraception, the brain, eye, temperature and kidneys, and plant hormones.

Lessons

  1. Homeostasis and the nervous systemWhat homeostasis is, the parts of a control system, neurones, synapses and the reflex arc. 25 min, free
  2. Required practical: reaction timeMeasuring reaction time with a ruler drop, turning distance into time, and analysing repeat and caffeine data. 25 min, free
  3. Hormones and blood glucoseThe endocrine glands, insulin and glucagon, type 1 and type 2 diabetes, thyroxine, adrenaline and negative feedback. 25 min, Plus
  4. Hormones in human reproductionThe four hormones of the menstrual cycle, how they control each other, contraception and IVF. 25 min, Plus
  5. The brain, the eye and body temperatureRegions of the brain, the eye and accommodation, correcting sight, and how the body controls its temperature. 25 min, Plus, Biology only
  6. The kidneys and plant hormonesHow the kidneys balance water and remove urea, ADH, dialysis and transplants, auxin and tropisms, and the seedling growth required practical. 25 min, Plus, Biology only

Practise and test

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