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

11.3 kidney from Bob Smullen


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):

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.

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.


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

‘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 tutorial on the menstrual cycle 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.