Unit 6 Organisms respond to changes in their internal and external environments

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AQA A-Level Biology – Topic 6.4: Homeostasis (Complete Notes) These notes cover everything you need to know for Topic 6.4: Homeostasis in the AQA A-level Biology specification, written in clear, concise language and fully aligned to the official spec and past paper mark schemes. Perfect for revision or to fill any gaps in your class notes, they break down complex processes into easy-to-follow steps, with keyword definitions, diagrams, and exam tips to help you maximise marks. Why these n...

AQA A-Level Biology – Topic 6.3 Skeletal Muscles Notes + HD Diagrams Ace Topic 6.3: Skeletal Muscles with these fully AQA-spec, mark-scheme-ready notes. Every point is explained clearly, in the exact language examiners look for — and backed up with high-quality, fully-labelled diagrams that make even the hardest concepts click instantly. Included: • All AQA-required content from muscle fibre structure to sliding filament theory. • Sarcomere banding patterns (Z-line, A-band, I-b...

A Level Biology Notes – Topic 6.2: Nervous Coordination (AQA Spec) High-quality, exam-focused revision notes for Topic 6.2 – Nervous Coordination, tailored to the AQA A Level Biology specification. These notes break down complex content into clear, digestible sections – ideal for mastering tricky concepts. What’s included: • Clear, concise explanations of neurone structure, resting potential, action potential, saltatory conduction, refractory period, and more • Detailed cov...

AQA A-Level Biology Notes – Topic 6.1.1: Survival and Response All key content for this topic, fully aligned with the AQA specification and written using mark scheme phrasing to help you hit top-band answers. These notes break down everything you need to know for 6.1.1 Survival and Response, with easy-to-follow explanations and hand-drawn diagrams to help visual learners understand and remember key processes. Includes: Reflex arc with labelled diagram Kinesis & taxis – definitions...

A Level Biology Notes – Topic 6.1.3: Control of Heart Rate (AQA Spec) Concise, specification-focused revision notes covering Topic 6.1.3 – Control of Heart Rate, designed to help you understand and retain key concepts quickly and effectively. All content is fully aligned with the AQA A Level Biology specification and written using mark scheme-approved terminology. What’s included: • Full coverage of the nervous control of heart rate via the autonomic nervous system • Explanat...

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