Bones, Joints, Muscles Flashcards
What is the function of long bones
Movement and support
What is the function of short bones
Stability/support
What is the function of flat bones
Protect internal organs and spot for muscle attachment
What is the function of irregular bones
Protect internal organs, movement, and support
What is the function of sesamoid bones
Protect tendons from force
Maxillary bones
Are fused to form upper jaw and central facial skeleton
Which ribs are true ribs
1-7 because they attach directly to the sternum
What ribs are false ribs
8-10 because they attach to cartilage
What ribs are floating ribs
11-12 because they have no attachment
What is the sarcomere
Basic unit of muscle fibers
What is the sarcomere responsible for
Muscle contraction
What does the sarcomere do
Gives skeletal and cardiac muscle it’s striated appearance
What is the sarcomere made up of
Thick and thin filaments (myosin and actin)
What is an isotonic muscle contraction
Movement
What is an isometric muscle contraction
No movement
Concentric contraction
Muscle shortens
Eccentric muscle contraction
Muscle lengthens
What is bursae
synovial fluid sacs that acts as a cushion between joints for smoother movement
What are ivd’s
Soft cushiony structures between vertebrae in spine
What are the functions of ivd’s
Shock absorption and spinal flexibility
Parts of ivd’s
Nucleus puposus : gel center
Annulus fibrosus: out stable layer
Where is SR found
Found in muscle cells
Sr stores calcium when
Muscles are at rest
Sr releases calcium when
Muscles are contracting
