Neural Control and Coordination | Nervous System & Reflex Action | NCERT Class 11 Biology |NEET 2026 скачать в хорошем качестве

Neural Control and Coordination | Nervous System & Reflex Action | NCERT Class 11 Biology |NEET 2026

This lecture covers Neural Control and Coordination, explained strictly according to NCERT Class 11 Biology and fully aligned with the NEET 2026 syllabus. The Nervous System is one of the most conceptual and high-weightage chapters in Human Physiology. Every year, 2–4 direct MCQs are asked from this chapter on topics such as: Neuron structure Nerve impulse conduction Synapse & neurotransmitters Reflex action Brain and spinal cord Autonomic nervous system Endocrine–nervous coordination This lecture is designed to provide: Crystal-clear diagrams NCERT-accurate terminology Strong concept clarity Fast revision friendly format Maximum scoring potential in NEET If you master this lecture, you can confidently secure full marks from Neural Control and Coordination in NEET. 🔬 Topics Covered in This Lecture (NCERT Order) 🔹 1. Introduction to Neural Control and Coordination Meaning of coordination Need for coordination in multicellular organisms Types of coordination: Nervous coordination Chemical (hormonal) coordination 📌 NEET Point: Nervous system provides fast and short-lived responses. 🔹 2. Organization of Nervous System ✅ Central Nervous System (CNS) Brain Spinal cord ✅ Peripheral Nervous System (PNS) Cranial nerves Spinal nerves ✅ Autonomic Nervous System (ANS) Sympathetic Parasympathetic 📌 NEET Favourite: ANS controls involuntary activities. 🔹 3. Neuron – Structural & Functional Unit Parts of neuron: Cell body Dendrites Axon Types of neurons: Sensory Motor Interneurons 📌 NEET Trap: Axon transmits impulse away from cell body. 🔹 4. Nerve Fibre & Myelination Myelinated fibres Non-myelinated fibres Nodes of Ranvier Saltatory conduction 📌 NEET Favourite: Impulse conduction is faster in myelinated fibres. 🔹 5. Generation & Conduction of Nerve Impulse Resting membrane potential Action potential Depolarization Repolarization Role of Na⁺ and K⁺ ions 📌 NEET Repeated Line: During depolarization, Na⁺ ions enter the neuron. 🔹 6. Synapse & Neurotransmission Electrical synapse Chemical synapse Synaptic cleft Neurotransmitters: Acetylcholine Noradrenaline 📌 NEET Favourite: Transmission across synapse is unidirectional. 🔹 7. Reflex Action & Reflex Arc Definition of reflex action Components of reflex arc: Receptor Sensory neuron Interneuron Motor neuron Effector 📌 NEET Point: Spinal cord is the center for reflex action. 🔹 8. Human Brain (Very Important) 🔸 Forebrain Cerebrum Thalamus Hypothalamus 🔸 Midbrain Reflex movements of head and eyes 🔸 Hindbrain Cerebellum Pons Medulla oblongata 📌 NEET Favourite: Hypothalamus links nervous and endocrine systems. 🔹 9. Protection of Brain Skull Meninges Cerebrospinal fluid (CSF) 📌 NEET Trap: CSF acts as a shock absorber. 🔹 10. Spinal Cord Continuation of medulla Controls reflexes Conducting pathway between brain and body 🔹 11. Autonomic Nervous System Feature Sympathetic Parasympathetic Action Fight or flight Rest and digest Heart rate Increases Decreases Pupil Dilates Constricts 📌 NEET Favourite: Sympathetic system prepares body for emergency. 🔹 12. Disorders of Nervous System Parkinson’s disease Epilepsy Alzheimer’s disease Myasthenia gravis 📌 NEET Trap: Myasthenia gravis affects neuromuscular junction. 📊 NCERT Summary Table (High-Yield) Part Function Neuron Conducts impulse Dendrite Receives impulse Axon Transmits impulse Synapse Junction between neurons Cerebellum Balance & posture Medulla Breathing & heartbeat ⚠️ NEET Traps Covered ✔ Impulse travels dendrite → axon ✔ Na⁺ influx causes depolarization ✔ Synapse transmission is unidirectional ✔ Reflex center = spinal cord ✔ Hypothalamus = homeostasis 🎓 Who Should Watch This Lecture? NEET 2026 & 2027 aspirants Class 11 Biology students Droppers revising NCERT Foundation batches Biology teachers 🔍 SEO Search Keywords (High Ranking) Neural Control and Coordination Nervous System NEET Neuron structure Reflex Action NEET Brain and Spinal Cord Autonomic Nervous System NCERT Neural Control NEET 2026 Biology Class 11 Nervous System Human Nervous System #NeuralControlAndCoordination #NervousSystem #NEET2026 #NEETBiology #NCERTBiology #Class11Biology #HumanPhysiology #Neuron #ReflexAction #Brain #OneShotBiology #BiologyLecture #ExamOriented ✅ Want Next?