skeletal muscle cells are striated/nonstriated, branched/unbranched
striated and unbranched
skeletal muscle cells are multinucleated- what does this form
cell containing multiple nuclei
where in a skeletal muscle cell are the nuclei found?
periphery of the fibre, just under the cell membrane
what is the cell membrane in a muscle cell called?
muscle fibres are grouped into bundles- what are these bundles called?
the connective tissue surrounding the entire muscle is called what?
the connective tissue surrounding a single fascicle is called what?
the connective tissue surrounding a single muscle fibre is called what?
each muscle fibre contains many myofibrils which are made up of what?
sarcomeres placed end-to-end
what other structures are contained within muscle?
blood vessels connective tissue nerves lymphatics
by definition where do sarcomeres begin/end?
when does the axon of a motor neurone branch?
as it nears its termination
what is the name given to the special synapse at the end of each branch of a motor neurons axon?
the fibres in a motor unit are bunched/scattered?
list some features of cartilage
semi-rigid and deformable permeable avascular
what are the cells found in cartilage called?
what is the name given to immature chondrocytes?
where exactly are chondrocytes found?
space within the extracellular matrix termed a lacuna
what is the function of chondrocytes?
secrete and maintin the extracellular matrix around them
what are the three types of cartilage?
what is the most common type of cartilage?
describe the appearance of hyaline cartilage
blue-white in colour
describe the appearance of elastic cartilage
light yellow in colour
quite flexible (addition of elastic fibres)
hybrid between tendon and hyaline cartilage
bands of densely packed type I collagen with rows of chondrocytes
what are the components of the ECM in hyaline cartllage?
25% organic material- type II collagen and proteoglycan
what is the difference between type I and type II collagen
- thicker (75nm)
- aggregates into linear bundles
- finer (15-45nm)
- forsm 3D meshwork
list some of the sites hyaline cartilage can be found in?
epiphyseal growth plates
precursor in fetus to many bones
list the functions of bone
levers for movement
what is the compostiion of bone?
65% bioapatite(calcium phosphate)
2% non collagen protiens