Скачать или смотреть Control and Coordination (Part 5) | A2-Level Biology 9700 | Virtual Pathways

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A2 Biology Chapter 15: Control and Coordination | Cambridge International AS & A Level Biology 9700 (2025–2027)

Welcome to this detailed A2 Biology playlist on Control and Coordination, designed for Cambridge International Biology 9700 students. In this chapter, we explore how multicellular organisms coordinate their activities through the nervous system and endocrine system, as well as how plants use chemical messengers to control growth and response to stimuli. Perfect for revision, lecture support, and exam preparation for CIE A Level Biology.

🧠 Control and Coordination in Mammals
Understand how coordination occurs rapidly through the nervous system and more slowly via hormones in the endocrine system. Learn about ADH, glucagon, and insulin, comparing their roles in homeostasis. Explore neurone structure (sensory, motor, and relay), the role of sensory receptors, and how action potentials are generated and transmitted. Study membrane potential, resting potential, saltatory conduction, and the refractory period in nerve impulse transmission.

💫 Dive into the cholinergic synapse, the role of calcium ions, and how synaptic transmission occurs. Learn how neuromuscular junctions, T-tubule systems, and the sarcoplasmic reticulum trigger muscle contraction. Examine the ultrastructure of striated muscle, sarcomere arrangement, and the sliding filament model involving actin, myosin, ATP, troponin, and tropomyosin.

🌱 Control and Coordination in Plants
Discover how plants coordinate growth and responses without nerves. Learn about the Venus flytrap’s rapid response, the role of auxin in cell elongation through proton pumping and cell wall acidification, and the germination of barley controlled by gibberellins.

🎓 Keywords: A2 Biology, Control and Coordination, Cambridge International, CIE 9700, Endocrine System, Nervous System, Neurones, Synapse, Muscle Contraction, Sarcomere, Sliding Filament Model, Action Potential, Resting Potential, Myelin Sheath, Saltatory Conduction, Neurotransmitters, Calcium Ions, Troponin, Tropomyosin, ATP, ADH, Insulin, Glucagon, Hormones, Auxin, Gibberellin, Venus Flytrap, Plant Hormones, Coordination in Mammals and Plants, Homeostasis, Biology Practical, Exam Revision, A Level Notes, Biology Lectures, Cambridge A Level Biology 2025–2027.

📘 Ideal for: AS & A2 students preparing for Paper 2 and Paper 4, teachers, and learners aiming for high grades in A Level Biology 9700. Subscribe for complete chapter explanations, diagrams, and topic-based MCQs!

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