What this topic covers
B3: Organism level systems has 3 subtopics:
- B3.1 Coordination and control - the nervous system
- B3.2 Coordination and control - the endocrine system
- B3.3 Maintaining internal environments
GCSE OCR Higher Biology
B3: Organism level systems – GCSE OCR Higher Biology revision notes
Revise B3: Organism level systems for GCSE OCR Higher Biology, including B3.1 Coordination and control - the nervous system. 35 lessons across 3 subtopics.
Nervous control, endocrine control and homeostasis. 35 lessons in 3 subtopics.
35
Lessons
3
Subtopics
B3: Organism level systems lessons by subtopic
35 lessons, grouped by subtopic.
B3.1 Coordination and control - the nervous system
- How the Nervous System Works
- Reflex Actions and the Reflex Arc
- Analysing Nervous System Data
- Structure and Functions of the Brain
- Investigating and Treating Brain Disorders
- Structure of the Eye
- Accommodation and Light Adaptation (Part 1/2)
- Accommodation and Light Adaptation (Part 2/2)
- Vision Problems and Corrections
B3.2 Coordination and control - the endocrine system
- Introduction to the Endocrine System
- Major Endocrine Glands and Their Locations
- Adrenaline: The Fight or Flight Hormone
- Thyroxine: Metabolism and Feedback Control
- Male and Female Reproductive Hormones
- The Menstrual Cycle and Hormone Control
- Hormonal methods of contraception
- Non-hormonal methods of contraception
- Evaluating contraceptive methods
- Hormone Fertility Treatments
- IVF Process and Procedures
- Challenges and Risks of Fertility Treatments
- Plant Hormones and Growth Responses
- Gibberellins and Ethene in Plant Development
- Plant Hormones in Agriculture and Horticulture
- Plant Hormones in Food Production
B3.3 Maintaining internal environments
- What is Homeostasis and Why is it Important?
- How Control Systems Work in Homeostasis
- Temperature Detection and Control
- Temperature Regulation Mechanisms
- How the Pancreas Controls Blood Glucose
- Types of Diabetes and Their Treatment
- Glucagon and Negative Feedback Control
- Water Loss and Osmotic Effects
- Kidney Function and Urea Formation
- ADH Control and Kidney Treatments
More in this course
Go back to the full GCSE OCR Higher Biology topic list, or practise this topic with past-paper questions.
Frequently asked questions
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These notes are for GCSE OCR Higher Biology. If you are on a different exam board or tier, choose your course from the Biology page instead, because the content is not always the same.
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Test yourself without the notes open, then try past-paper questions on the same topic. The questions you get wrong tell you which lesson to go back to.