Sarcomere
The cell is the basic functioning unit of living things.
cell
The cell is the basic unit of structure and function in living things.
The cell is the smallest structural unit of living matter capable of functioning independently. Each cell contains all the necessary components to carry out life processes such as metabolism, growth, and reproduction.
A cell is the basic and smallest unit of an organism.
Organization
Organization
The myofibril is the basic muscle cell, within which is the sarcomere, the basic unit of muscle contraction.
Sarcomere
A motor unit consists of a motor neuron and all the muscle fibers it innervates. When the motor neuron fires, all the muscle fibers in the motor unit contract simultaneously. This coordinated activation allows for precise control of muscle force and movement.
A muscle cell is a cell which can change length
Levels of organization of muscle ( in decreasing order)1. Muscle: Group of muscle fascicles, which work together to cause one specific movement.2. Fascicle: Bundle of muscle fibers3. Muscle fiber: Muscle cell: cylindrical cell of skeletal muscle. It has many nuclei, therefore it is called multinucleate.4. Myfibril: Contractile fibers found within a muscle cell. It has 100 - 1000's of muscle cells in each muscle fiber.5. Sarcomere: Structural and Functional unit of the muscle. It is the smallest unit of a muscle that is able to contract.6. Actin and myosin filaments: Filamentous proteins which can interact together to cause contraction.