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Chapter Summary

Nervous System

ICSE · Class 10 · Biology

Summary of Nervous System for ICSE Class 10 Biology. Key concepts, important points, and chapter overview.

45 questions45 flashcards5 concepts

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A labeled diagram of the human vertebral column, showing the different regions (cervical, thoracic, lumbar, sacral, coccygeal) and the number of vertebrae in each, including fused bones.
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Overview

The nervous system is the main control system of the body. It coordinates the activities of different organs by carrying electrical impulses and controls both voluntary and involuntary actions. Its basic unit is the neuron, a specialised cell adapted to transmit information rapidly.

Key Concepts

A neuron

A neuron, also called a nerve cell, is the basic structural and functional unit of the nervous system. Neurons number over a trillion in man. Each neu

The soma

The soma, also called cyton or cell body, is the star-shaped main body of the neuron. It contains a large centrally placed nucleus and Nissl's granule

Dendrites are fibre

Dendrites are fibre-like branches extending from the cyton. They receive impulses and carry them towards the cell body.

The axon is a long fibre

The axon is a long fibre-like part extending from the cyton. It is mostly covered by a myelin sheath, interrupted by Nodes of Ranvier, and ends in axo

The myelin sheath is not

The myelin sheath is not a part of the neuron. It is secreted by Schwann cells, which remain attached to it. The sheath protects the axon and speeds u

Learning Objectives

  • Understand the role of the nervous system as the body's control system
  • Describe the structure and types of neurons
  • Explain how nerve impulses travel along neurons
  • Define synapse, ganglia and nerves
  • Differentiate between central, peripheral, somatic and autonomic nervous systems

Frequently Asked Questions

What are the important topics in Nervous System for ICSE Class 10 Biology?
Nervous System covers several key topics that are frequently asked in ICSE Class 10 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Nervous System — ICSE Class 10 Biology?
Understand the core concepts first, then work through the 45 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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All 16 chapters — ICSE Class 10 Biology Chapter Summary

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