6.4.1 Principles of Homeostasis and Negative Feedback

Study Mind AQA A-Level Biology 🧬🔬

A-Level Biology Study Guide

A-Level Biology Part 2 (Chapters 38-70)
A-Level Biology Part 1 (Chapters 1-37)
A-Level Biology Part 3 (Chapters 70-130)
A-Level Biology Part 4 (Chapters 130-180)
A-Level Biology Part 5 (Chapters 180-250)
A-Level Biology Part 6 (Chapters 250-306)

Study Mind Flashcards - AQA A-Level Biology

WEEKLY A-LEVEL BIOLOGY + CHEMISTRY CLASSES

3.1 Biological Molecules (Content: Videos + Flashcards + Textbook)

1.1 Monomers and Polymers (5:40)
1.2 Carbohydrates (16:09)
1.3 Lipids (7:50)
1.4 Proteins (10:10)
1.5 DNA and RNA (10:32)
1.6 ATP (5:30)
1.7 Water (9:39)
1.8 Inorganic Ions (7:21)

3.1 Biological Molecules (Exam Technique: Examiner's Tips + Past Papers)

3.2 Cells (Content: Videos + Flashcards + Textbook)

2.1.1 Structure of Eukaryotic Cells (5:35)
2.1.2 Cell Organelles (27:06)
2.1.3 Structure of Prokaryotes and Viruses (8:25)
2.1.4 Methods of Studying Cells (18:48)
2.1.5 Cell Division, Cell Cyle and Mitosis (16:10)
2.1.6 Binary Fission and Viral Replication (4:17)
2.1.7 Investigating Mitosis (8:05)
2.1.8 Structures of Cell Membranes (15:54)
2.1.9 Transport Across Cell Membranes (21:42)

3.2 Cells (Exam Technique: Examiner's Tips + Past Papers))

3.2 Immunity

2.2.1 Antigens and Self Tolerance (8:39)
2.2.2 Phagocytosis (6:32)
2.2.3 Adaptive Immune Response (7:36)
2.2.4 Antibodies (9:41)
2.2.5 Types of Immunity and Vaccination (8:06)
2.2.6 HIV (9:32)

3.2 Immunity (Exam Technique: Examiner's Tips + Past Papers))

3.3 Exchange Between Organisms

3.1 Surface Area to Volume Ratio (5:06)
3.2a Gas Exchange (13:11)
3.2b Gas Exchange (20:31)
3.2c Gas Exchange (4:05)
3.3a Digestion and Transport (11:54)
3.3b Digestion and Transport (5:37)
3.3c Digestion and Transport (7:41)

3.3 Exchange between Organisms (Exam Technique: Examiner's Tips + Past Papers))

3.4 DNA and Genes

4.1 DNA, Genes and Chromosomes (16:31)
4.2 DNA and Protein Synthesis (17:38)
4.3 Mutations (8:08)
4.4 Meiosis (15:27)
4.5 Evolution and Natural Selection (11:57)
4.6 Species and Taxonomy (13:12)
4.7 Biodiversity within a community (11:53)
4.8. Investigating Biodiversity (11:36)

3.4 Genetic information, variation and relationships (Examiner Tutorials)

3.5 Energy transfers in and between organisms (A-level only)

3.5 Energy transfers in and between organisms (Examiner Tutorials)

3.6 Organisms respond to changes in their internal and external environments (A-level only)

6.1.1 Survival and Response (13:22)
6.1.2 Receptors (8:26)
6.1.3 Control of Heart Rate (9:38)
6.2.1 Nerve Impulses (14:52)
6.2.2 Synaptic Transmission (14:46)
6.3 Skeletal Muscle Effectors (15:39)
6.4.1 Principles of Homeostasis and Negative Feedback (17:37)
6.4.2 Control of Blood Glucose Concentration (22:50)
6.4.3 Control of Blood Water Potential (19:55)

3.6 Organisms respond to changes in their internal and external environments (Examiner Tutorials)

3.7 Genetics, populations, evolution and ecosystems (A-level only)

3.7 Genetics, populations, evolution and ecosystems (Examiner Tutorials and Past Papers)

3.8 The control of gene expression (Exam Technique: Examiner's Tips + Past Papers)

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