Nervous System | Part 1 | PSP SIR

Описание: In this comprehensive session, PSP Sir kicks off the Nervous System series at Unacademy Centre Ahmedabad. This lecture covers the structural classification of neurons and provides a deep dive into the fundamental physics and chemistry of nerve physiology—essential for Class 11 Biology and NEET aspirants.

Key Topics Covered:

Classification of Neurons (Based on Structure):

Non-polar (Apolar) Neurons: Primitive neurons found in Hydra and Coelenterates.

Unipolar Neurons: Typical in vertebrate embryos.

Bipolar Neurons: Found in specialized sensory organs like the Retina and Inner Ear.

Multipolar Neurons: The most common type, found in the Cerebral Cortex.

Pseudo-unipolar Neurons: Located in the Dorsal Root Ganglia of the Spinal Cord.

Functional Classification:

Sensory (Afferent) Neurons: Carrying information from the body to the CNS.

Motor (Efferent) Neurons: Delivering commands from the CNS to the body.

Interneurons: Facilitating interpretation and analysis within the Brain and Spinal Cord.

Fundamentals of Nerve Physiology:

Resting Membrane Potential (RMP): Why the inner surface is negative and the outer surface is positive (-70 mV).

Ionic Distribution: The roles of Sodium (Na+), Potassium (K+), and negatively charged proteins in the ICF and ECF.

Membrane Permeability: Understanding Leak Channels, Voltage-Gated Channels (VGC), and the importance of Transmembrane Proteins.

Mechanism of Polarization:

A detailed explanation of how the Sodium-Potassium Pump uses 1 ATP to transport 3 Na+ out and 2 K+ in, maintaining the resting state of a neuron.

Why Watch This Video? PSP Sir uses logical flowcharts and easy-to-remember analogies to simplify the "Toughest Part of Human Physiology." This session ensures you don't just memorize the facts but understand the why behind nerve impulse generation.

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