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MUSCLE TISSUES, SKELETAL MUSCLES, SMOOTH MUSCLES - Coggle Diagram

- - - - contains collagen, elastic fibres, blood vessels, and nerves that supply the muscle fibres within the fascicles
    - - a dense layer of collagen fibres that surrounds the entire muscle
    - - surrounds the individual skeleton muscle cells (muscle fibres)
  - - - narrow tubes and filed with ECF
    - - forms a tubular network around each myofibril
    - - Surrounds the sarcoplasma (cytoplasm of muscle fibre)
      - Has membrane potential, its change leads to a contraction
      - Plama membrane of muscle fibre
    - - Consists of bundles of microfilaments (thin and thick)
    - - Smallest functional unit of muscles fibres
      - bands
        
        I band (contains only think filaments)
        
        H band (contains thick filaments and bisect A band)
        
        M line (the middle of H bands)
        
        A band (contains regions of thick and thin filaments)
        
        Z line (Bisect the I band)
  - - - -neural control
        -excitation
        -release of calcium ions
        -contraction of cycle begins
        -sarcomere shortening
        -generation of muscle tension
    - - -contraction cycle begins
        -active-site exposure
        -cross-bridge formation
        -myosin head pivoting
        -cross-bridge detachment
        -myosin reactivation
    - - -ACh release electrical impulses at the axon terminal
        -permeability changes in membrane
        -exocytosis of ACh into the synaptic cleft
        -ACh molecules diffuse across the synaptic cleft and bind to ACh receptor membrane channels
        -Na ions rush into cytosol
        -results in generation of action potential in sarcolemma
- - - - filaments are attached to dense bodies (twist when contract)
      - collagen fibres are not forming tendons or aponeuroses
      - have actin and myosin contractile proteins
    - - Length-tension relationships
      - Control of contractions
      - Excitation-contraction coupling
      - Smooth muscle tone