Please enable JavaScript.

Coggle requires JavaScript to display documents.

MUSCLE HISTOLOGY (SKELETAL (ORGANIZATION (Molecular (FILAMENT (actin &…

- - - - reproductive tract
      - urinary tract
      - digestive tract
      - blood vessels
    - - limbs
      - abdomen
      - face
      - diaphragm
- - - - SYNCYTIUM
  - - - cylindrical bodies
        
        nuclei along edges
      - striations
        
        perpendicular to myofibrils
        
        A & I bands
    - - big blobs with lots of little dots within
      - nuclei along edges, squished
  - - - T-tubules close to SER
        
        stimulation of membrane
        
        Ca2+ release
    - - contraction
        
        :small_red_triangle: conformation : myosin pulls actin
      - release
        
        ATP
      - crosslinking
        
        Ca2+
      - reposition
        
        ATP hydrolyzation
  - - - FIBER
        
        ENDOMYSIUM
    - - FIBRIL
        
        band of filaments
    - - FASCICLE
        
        PERIMYSIUM
    - - FILAMENT
        
        actin & myosin
      - Components
        
        sarcomeres
        
        A-band
        
        actin + myosin
        
        I-band
        
        triad
        
        actin/SR
        
        STRIATION
        
        z-band/t-tubule
        
        actin/SR
        
        Z-band
        
        actin attachment
        
        actin
        
        troponin
        
        tropomyosin
        
        myosin
        
        ATPase activity
    - - Gross muscle
        
        EPIMYSIUM
- - - - cylindrical, branched bodies
        
        nucleus in center, roundish, 1-2/cell
      - striations
        
        short & branched
        
        INTERCALATED DISCS
        
        thick bands at ends of cells, staggered
    - - big blobs, little dots within
      - nuclei in center
  - - - INTERCALATED DISCS
        
        adherens junctions
        
        connect cells
        
        gap junctions
        
        communication
        
        desmosomes
        
        support/anchor
    - - A-band
        
        actin
      - I-band
        
        diad
        
        actin/SER
        
        z-band/T-tubule
        
        only one SER needed cuz most stimulation will come from Ca2+ ext.
      - z-band
        
        actin & myosin
  - - - auto-rhythmic/pacemaker
      - sino-atrial node
      - under lining of ventricle
      - tissue looks a little fuzzier than rest of cardiac muscle
- - - - single, round, central nucleus
      - bundles, no striation (cross)
      - looks like my hair in the morning, with some bunches of it doing one wave and others doing something else
    - - small bundles, NO dots within
      - very irregular, but clearly defined nuclei
  - - - less organized
        
        elongated
        
        spindle shaped
    - - bundles overlap
    - - no sarcomeres (not defined at least
    - - bundles & sheets
        
        collagen type III & reticular around cells
  - - - slower contractions
    - - stretching
      - hormones
      - NTs