17. LOCOMOTION AND MOVEMENT
Movement is a vital feature of all living beings, including various forms such as protoplasmic streaming and locomotion, which occurs primarily in search of resources or safety. The chapter elaborates on the types of movements within human cells, focusing on amoeboid, ciliary, and muscular movements. It highlights the structure and function of muscle types and the skeletal system, noting the importance of muscle contraction mechanisms and the variety of joints facilitating movement.
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What we have learnt
- Movement is essential for survival and is categorized into different types across living organisms.
- There are three main types of muscles in the human body, each with unique properties and functions.
- The skeletal system provides the necessary framework for body movement and is divided into the axial and appendicular skeleton.
Key Concepts
- -- Locomotion
- A voluntary movement causing an animal to change its place, mainly for survival needs such as food and safety.
- -- Sliding Filament Theory
- A mechanism explaining muscle contraction, where actin filaments slide over myosin filaments, leading to the shortening of the muscle.
- -- Amoeboid Movement
- Type of movement displayed by some specialized cells in the body, characterized by the streaming of protoplasm.
- -- Skeletal System
- A framework of bones and cartilages that supports the body and facilitates movement.
- -- Muscle Types
- The three primary muscle types are skeletal (voluntary), visceral (involuntary and non-striated), and cardiac (involuntary and striated).
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