Tag Archives: homeostasis

IGCSE Bio Topic 14 – Coordination & Response

For self-assessment questions, with exercises and discussions, just click on the correct topic at Biology GCSE & IGCSE Question Bank. The s-cool revision site lets you revise the topic, summarizes the topic & tests you on it. Skoool gives you a lesson, including progress questions, for each Biology topic but you’ll need sound on for it. GCSE Bitesize has revision pages (that take you through the topic), a test and an activity.

An excellent powerpoint that covers it all:

14.4 Homeostasis

A good powerpoint that includes osmoregulation:

Homeostasis of the body from Claire Gaukrodger

14.4 Homeostasis notes in downloadable word format.

A lesson on Thermoregulation from Mr Dare:

Science Bank 16 (Homeostasis): part 1 – controlling Temperature (to 5m 10s), part 2 – controlling Water Levels (to 9m) & part 3 – controlling Blood Sugar Level (to 14m 10s):

A powerpoint can be downloaded from here, a 5m 33s animation on Homeostasis is here & this link to GCSE Bitesize will help you revise the topic.

Videos include The Virtual Body – Homeostasis (19m), Homeostasis – The New Living Body (19m) & BBC Short Circuit Homeostasis (19m).


11.3 The Kidney & Osmoregulation

BioKnowledgy Presentation on 11.3 The kidney and osmoregulation (AHL) from Chris Paine


Mr Paul Andersen (from Bozeman High) describes Osmoregulation (including in fish which you don’t need to know) in a 8m 57s lesson.

Osmoregulator or Osmoconformer? Here are two videos about contractile vacuoles in Paramecium (they are osmoregulators): Paramecium vacuole (1m video) and contractile vacuole (a 27s explanation). If it goes wrong – Paramecium exploding!


A nice introduction to how the kidneys work (from TED-Ed):

A superb flash animation on the Kidneys from kscience.

An animated tutorial from McGraw Hill Education on basic Renal processes and here’s an animated, narrated tutorial on the mammalian kidney which also includes a quiz (from Sinauer Associates).

In Crash Course Biology #29 – The Excretory System: From Your Heart to the Toilet, Hank takes us on the fascinating journey through our excretory system to learn how our kidneys make pee.

D5 Hormones & Metabolism (HL only)

Hormonal Control from Stephen Taylor – thank you Mr Taylor (of iBiology).

The fight or flight response as an example of cells signalling other cells (4m 34) – you don’t need to know this:


6.6 Hormones, Homeostasis & Reproduction

BioKnowledgy presentation on 6.6 hormones homeostasis and reproduction from Chris Paine

6.6 Hormones, Homeo & Repro notes to complete (created by Mrs Green).

IB Biology 6.6 notes – Cheryl Haus talks us through the topic while making notes in a 1 hour video.

Some past paper questions answered by IB Blueprint: Nerves, hormones and homeostasis – Paper 1 Questions ; Nerves, hormones and homeostasis – Paper 2Reproduction – Paper 1 QuestionsReproduction – Paper 2 Questions.


Crash Course Biology #33: Great Glands – Your Endocrine System (11m). Hank also does Endocrine System, part 1 – Glands & Hormones (Crash Course A&P #23) in 10m 24s and part 2, Hormone Cascades (Crash Course A&P #24) in 9m 33s.

The Endocrine system explained in under 4 minutes – a nice introductory video – or here is a 5m video The Endocrine System in more detail than you need or Mr Andersesn’s The Endocrine System in 13m 47s.

Click on ‘Signal Transduction’ to see an Interactive Animation from Wiley on how hormones work & Cholera (& lots more that you don’t need to know).


Positive & negative feedback loops, a 14m video lesson from Mr Andersen, who also teaches us elements of a feedback loop in 9 minutes.

An animated tutorial from McGraw Hill Education on blood sugar regulation in diabetics. and here is ‘What does the Pancreas do?’ (from Emma Bryce & TED-Ed):


How menstruation works and Why do women have periods? – 2 videos from TEDEd.

Animated, narrated tutorials on the menstrual cycle and on pregnancy testing which also include a quiz (from Sinauer Associates); there’s also an animated, narrated tutorial on IVF.

In Crash Course Biology #34 – The Reproductive System: How Gonads Go, Hank lets us in on the meaning of life, at least from a biological perspective – it’s reproduction.

The physics of sperm vs. the physics of sperm whales from TED-Ed.