Category Archives: B7 Coordination & Response

B7 Syllabus Statements

All of the B7 Revision notes in downloadable word format and here are key terms and some definitions: Key Terms B7

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:

B7.1 The Nervous System

Science Bank 15 (Responding to Stimuli): Part 1 – the Eye (to 5m 30s); Part 2 – the Nervous System (to 9m 25s):

B7.1 Revision notes

GCSE Bitesize revises The Nervous System (in 8m 27s) and here’s a short (less than 5 minute) video clip from BBC iScience – The Eye.

Other videos include Science in Focus – Wired Nervous System (22m 51s), The Virtual Body – Sensory Systems (19m) & BBC Short Circuit The Eye (19m).

Another power-point (this one includes the eye):


IGCSE Biology: Coursebook, chapter 10, pp.126 – 134

B7.3 Tropic Responses

Tropisms from Marthese Azzopardi

Science Bank 15: Part 3 covers Plant Tropisms (from 9m 25s to 14m 30s):

B7.3 Revision notes

A 3 minute introduction to tropisms (from Twig World).

Plant Control – Paul Andersen explains how plants use hormones to respond to their environment. We only need to know about auxins (to 3m 40s).


IGCSE Biology: Coursebook, chapter 10, pp. 139 – 142

B7.4 Homeostasis

A good powerpoint (although we don’t need the last few slides about controlling water levels):

Homeostasis of the body from Claire Gaukrodger

Science Bank 16 (Homeostasis): You only need Part 1 – Controlling Temperature (to 5m 10s) & Part 3- Controlling Blood Sugar Level (from 9m to 14m 10s):

B7.4 Revision notes

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).


IGCSE Biology: Coursebook, chapter 11, pp. 145 – 151

This powerpoint covers Homeostasis & Negative Feedback to slide 27; that’s all we need: