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Nervous System — Revision Notes

ICSE · Class 7 · Biology

Nervous System revision notes for ICSE Class 7 Biology: 4 topics in quick points. Key terms: Coordination is, A neuron and The cyton is the main cell.

70 questions36 flashcards5 concepts

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Key Topics to Revise

1

1. Coordination and Nervous Coordination

  • Coordination means the interaction of body activities according to the needs of the body, inside or outside.
  • Two types of coordination are nervous coordination and chemical coordination.
  • Nervous coordination is brought about by the nervous system, which includes the brain, spinal cord, nerves, and sense organs.
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2. Neuron: The Structural and Functional Unit

  • A neuron is the structural and functional unit of the nervous system.
  • A neuron has three main parts: cyton, dendrites, and axon.
  • Cyton is the main cell body and contains a nucleus.
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3. Types of Neurons and Nerves

  • There are three types of neurons: sensory neurons, motor neurons, and association neurons.
  • Sensory neurons carry impulses from sensory cells or sense organs to the spinal cord or brain.
  • Motor neurons carry messages from the brain or spinal cord to effectors such as glands or muscles.
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4. Human Nervous System

  • The human nervous system has two main divisions: the central nervous system and the peripheral nervous system.
  • The central nervous system consists of the brain and spinal cord.
  • The brain lies within the skull.

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Full Notes

Key Concepts

Coordination is the interaction of bodyA neuronThe cyton is the main cellDendrites are fine cytoplasmic extensionsThe axon is the long process

Frequently Asked Questions

What are the important topics in Nervous System for ICSE Class 7 Biology?
Key topics in Nervous System include Coordination and Nervous Coordination, Neuron: The Structural and Functional Unit, Types of Neurons and Nerves, Human Nervous System. Study these first, then practise questions on each for Class 7 exams.
How should I revise Nervous System for Class 7 exams?
Learn the core ideas first, then work through the 70 practice questions on Nervous System. Revise 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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