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Neural Control and Coordination — Revision Notes

ICSE · Class 11 · Biology

Neural Control and Coordination revision notes for ICSE Class 11 Biology: 4 topics in quick points. Part of the ICSE Class 11 Biology syllabus.

64 questions48 flashcards4 formulas & key relations5 concepts

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Illustrates the evolution of neural systems from simple nerve nets (e.g., Hydra) to more complex, centralized systems with a brain (e.g., human).
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Key Topics to Revise

1

1. Overview of the Neural System

  • The neural system of all animals is composed of highly specialised cells called neurons which can detect, receive and transmit different kinds of stimuli.
  • In mammals, the nervous system is divided into the central nervous system and the peripheral nervous system.
  • The central nervous system consists of the brain and spinal cord.
2

2. Brain: Structure and Major Parts

  • The human brain is the central information processing organ of the body.
  • It weighs about 1,350 g in an average adult.
  • It is made up of about 1,000 billion neurons and neuroglia.
3

3. Spinal Cord and Spinal Nerves

  • The spinal cord is the downward continuation of the medulla oblongata.
  • It descends through the vertebral canal and ends at the lower border of the first lumbar vertebra.
  • The spinal cord has cervical and lumbar enlargements.
4

4. Nerve Fibres, Nerves and Synapse

  • Nerve fibres are axons or dendrites enclosed by a connective tissue sheath.
  • Nerve fibres are classified into myelinated and non-myelinated fibres.
  • Non-myelinated fibres lack a myelin sheath.

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Full Notes

Key Concepts

CoThe neural system of animalsThe central nervous system includesThe human brain weighs about 1The midbrain lies between the forebrain

Frequently Asked Questions

What are the important topics in Neural Control and Coordination for ICSE Class 11 Biology?
Key topics in Neural Control and Coordination include Overview of the Neural System, Brain: Structure and Major Parts, Spinal Cord and Spinal Nerves, Nerve Fibres, Nerves and Synapse. Study these first, then practise questions on each for Class 11 exams.
How should I revise Neural Control and Coordination for Class 11 exams?
Learn the core ideas first, then work through the 64 practice questions on Neural Control and Coordination. 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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All ICSE Class 11 Biology Revision Notes

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