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Locomotion and Movement

CBSE · Class 11 · Biology

Quick revision notes for Locomotion and Movement — CBSE Class 11 Biology. Key concepts, formulas, and definitions for last-minute revision.

127 questions78 flashcards5 concepts

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Key Topics to Revise

1

1. Types of Movement

  • Human cells show three main types of movement: amoeboid, ciliary, and muscular.
  • Amoeboid movement is shown by macrophages and leucocytes. It occurs by pseudopodia formed through streaming of protoplasm.
  • Ciliary movement occurs in ciliated tubular organs. In the trachea, cilia help remove dust particles and foreign substances.
2

2. Muscle: Structure and Types

  • Muscle is a specialised tissue of mesodermal origin.
  • About 40-50% of adult human body weight is made up of muscles.
  • Muscles show four properties: excitability, contractility, extensibility, and elasticity.
3

3. Structure of Myofibril and Sarcomere

  • A myofibril shows alternate dark and light bands.
  • The light band is the I band and contains actin.
  • The dark band is the A band and contains myosin.
4

4. Contractile Proteins

  • Actin is the thin filament protein.
  • Each actin filament is made of two F actins helically wound together.
  • Each F actin is a polymer of G actins.

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Full Notes

Key Concepts

Movement is any change in positionHuman cells show amoeboidMuscles are of three types basedEach muscle fibre is lined byA sarcomere is the portion

Frequently Asked Questions

What are the important topics in Locomotion and Movement for CBSE Class 11 Biology?
Locomotion and Movement covers several key topics that are frequently asked in CBSE Class 11 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Locomotion and Movement — CBSE Class 11 Biology?
Understand the core concepts first, then work through the 127 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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