WJEC GCSE Science Double Award: Response and regulation (Unit 4, Biology 2) overview
An overview of the Response and regulation module in WJEC GCSE Science Double Award (Unit 4, Biology 2), mapping the nervous system and reflexes, the eye and focusing, hormones and blood glucose, and homeostasis and temperature regulation.
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The Response and regulation module gathers the coordination and control content of Biology 2 in WJEC GCSE Science Double Award. It explains how the body senses and responds to its surroundings and keeps its internal conditions steady. This page maps the module and links to a focused answer page for each part.
The topics in this module
- The nervous system and reflexes
- The nervous system, the impulse pathway and the reflex arc. See The nervous system and reflexes.
- The eye and focusing
- The structure of the eye, accommodation and the pupil reflex. See The eye and focusing.
- Hormones and blood glucose
- Hormones as chemical messengers and the control of blood glucose by insulin. See Hormones and blood glucose.
- Homeostasis and temperature regulation
- Homeostasis and how body temperature is controlled. See Homeostasis and temperature regulation.
How this module fits the exam
These topics sit in Unit 4 (Biology 2), a written paper of 1 hour 15 minutes worth 15%. Questions mix recall (eye parts, hormones), ordered pathways (the reflex arc, glucose control) and explanation (temperature regulation).
How to study this module
- Learn the reflex arc. The pathway in order and why reflexes are fast.
- Know the eye. The parts, accommodation, and the pupil reflex.
- Master glucose control. Insulin, glycogen, and the two types of diabetes.
- Compare the systems. Nervous (fast, electrical) versus hormonal (slow, chemical).
- Understand homeostasis. Temperature control and the idea of negative feedback.
Then test yourself with the module quiz.