Muscles And Bones Flashcards
What pair are biceps and triceps?
Antagonist pair
What is an antagonist pair?
One muscle contracts while the other relaxes
What is abduction? Give an example.
Moving a limb away from midline, ex=deltoids, muscles which move limbs
What is adduction? Give an example.
Moving limb towards midline. Ex
What is the order of muscle structure?
Muscle, muscle bundles, muscle fibres, myofibrils, myofilament, actin, myosin
Sacromere
Contractile unit made up of actin and myosin
H-band
Distance between actin
A-band
Length of myosin
Z-disc
Point at which sarcomeres join together
Name parts of long bone
Epiphysis, diaphysis, periosteum
Epiphysis structure/function
-End of bone
-compact bone around cancellous bone (cancellous bone create RBC)
Diaphysis structure/function
-main length of bone
-hollow tube of compact bone (contains bone marrow)
Periosteum structure/function
-fibrous outer layer around diaphysis
Name two types of skeletons
Axial and periphery
Axial skeleton
Skull, spine and ribs