Skeletal Muscle Flashcards
1
Q
Z line
A
Actin
Boarders of sarcomere
2
Q
M line
A
Myosin
Middle of sarcomere
3
Q
A band
A
Myosin fibers excluding the actin overlap; remains the same regardless of muscle length
4
Q
H band
A
Myosin without actin overlap
Shortens with muscle contraction; lengthens with relaxation
5
Q
I band
A
Actin without myosin overlap; includes Z band
Shortens w/ contraction, lengthens with relaxation
6
Q
Golgi Tendon Organ
A
Detects change in tension; turns muscle off
7
Q
Muscle spindle fibers
A
Detect change in length; turn muscle on
