MSK Basic Science Flashcards
what are Osteoprogenitor cells?
a reserve pool of osteoblasts
what are Osteoblasts?
bone forming cells
what are Osteocytes?
bone cells trapped in the bone matrix
what are Osteoclasts?
bone cells that do bone reabsorption
what are muscle fibres grouped into?
fascicles
connective tissue round the whole muscle?
epimysium
connective tissue around a single muscle fibre?
endomysium
what type of bone makes up the shaft?
cortical bone
what type of bone makes up the epiphysis?
trabecular
what muscles are striated?
skeletal and cardiac
what muscles are unstriated?
smooth muscle
functional unit of muscle?
sarcomere
muscle contraction
Ca release from SR
binds to troponin, causing tropmyosin to move and uncover the binding sites
myocin attaches to actin
(ATP NEEDED)
what is the border of sarcomeres?
Z lines
