Cambridge IGCSE Biology, topic 14
Coordination and response
Organisms detect changes in their surroundings and respond to them. This topic covers how the nervous system carries electrical impulses, how the eye detects light and how hormones and the chemical control of plant growth coordinate responses. It also covers homeostasis, the maintenance of a constant internal environment.
Revision notes
Worksheet
FlashcardsSubtopics
Work through them in order. Each one has notes, exam questions and flashcards, and a PDF of each.
- 1Nervous control Spec 14.1The central and peripheral nervous systems, types of neurone, reflex arcs and how synapses pass impulses between neurones.NotesQuestions 6Flashcards 11
- 2Sense organs Spec 14.2Sense organs and the structure and function of the eye, the pupil reflex, accommodation, and rods, cones and the fovea.NotesQuestions 7Flashcards 15
- 3Hormones Spec 14.3Hormones and endocrine glands, how hormonal and nervous control compare, and the effects of adrenaline.NotesQuestions 5Flashcards 6
- 4Homeostasis Spec 14.4Homeostasis and negative feedback, control of blood glucose, treating Type 1 diabetes and temperature control by the skin.NotesQuestions 7Flashcards 11
- 5Tropic responses Spec 14.5Gravitropism and phototropism, how auxin controls shoot growth, and how to investigate tropisms.NotesQuestions 5Flashcards 6
Whole topic
When you have done the subtopics: test yourself on everything, or print the lot.