Neural Control and Coordination
Madhya Pradesh Board · Class 11 · Biology
Quick revision notes for Neural Control and Coordination — Madhya Pradesh Board Class 11 Biology. Key concepts, formulas, and definitions for last-minute revision.
Key Topics to Revise
Coordination and Neural System Overview
- Coordination is the process through which two or more organs interact and complement each other's functions
- Example: During physical exercise, muscles need more oxygen, so heart rate increases, breathing rate increases, and blood flow increases
- Neural system and endocrine system jointly coordinate all body activities
Organization of Nervous System
- Human neural system divided into: Central Neural System (CNS) and Peripheral Neural System (PNS)
- CNS includes brain and spinal cord - site of information processing and control
- PNS comprises all nerves associated with CNS
Structure of Neuron
- Neuron has three major parts: Cell body, Dendrites, and Axon
- Cell body contains cytoplasm with typical organelles and Nissl's granules
- Dendrites: Short fibres branching from cell body, contain Nissl's granules, transmit impulses TOWARDS cell body
Generation and Conduction of Nerve Impulse
- Neurons are excitable cells with polarized membranes
- Resting membrane: More permeable to K+, nearly impermeable to Na+, impermeable to proteins
- Axoplasm: High K+ and proteins, low Na+
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