Exam 1 study guide flash cards
Which structure defines the borders of the sarcomere?
Z disk
Primary contractile unit of skeletal muscle
sarcomere
Also known as connectin, provides stucture and elasticity to sarcomere
titin
Intermediate filament protein that connects adjacent myofibrils
Desmin
Region of the sarcomere that becomes shorter during muscle contraction and longer during relaxation
I band
Giant protein that spans half the lenght of the sarcomere
Titin
Binds myosin to Z disk
titin
Binds calcium ions, initates muscle contraction by triggering a conformationan change
troponin
Covers the myosin binding sites on actin in relaxed muscle
tropomyosin
Region within the A band where only mysin filaments are present
H zone
Protein responsible for pulling actin filaments during muscle contraction
Myosin
Central region of the sarcomere where myosin is anchored
M line
Structural protein that cross-links actin filaments @ the Z disk
Alpha-Actinin
During which developmental stage are the body’s major organs and system developed?
Embryonic Development
Supports and binds muscle fibers, plas a role in force transmission and repair.
Basement Membrane
Which cells have the potential to fuse with damaged muscle fibers aiding in repair and regeneration?
Satellite cells
Which membrane system is responsible for releasing and storing calcium in the muscle cell?
Sarcoplasmic Reticulum
Thick filament protein
Myosin
Myocyte appearance
Long cylindrical cells with nuclei pushed to the periphery
Structure made up of sarcomeres respnsible for muscular contraction
myofibril
Process of muscle fibers increasing size after birth
Hypertrophy
Extracellular signals that play a role in muscle differentiation
-Growth Factors
-Hormones
-Neuronal Signals