Please enable JavaScript.
Coggle requires JavaScript to display documents.
SKELETAL MUSCLE (Muscle Contraction and Relaxation Steps (Calcium binds at…
SKELETAL MUSCLE
-
-
MUSCLE FIBERS
-
-
-
Transverse (T) Tubules
Projection of the sarcolemma into the interior of the cell-permit rapid transmission of the action potential into the cell, and also play an important role in regulating cellular calcium concentration
-
-
Microscopic Components
Sarcomere
Longitudinally, repeating functional unit of skeletal muscle, with all the contractile and associated proteins involved in contraction
-
-
-
Striations-muscle tissue that is marked by transverse dark and light bands, is made up of elongated usually multinucleated fibers
Z-Disc
Zig-zag line that Actin attaches to & delineate the lateral borders of sarcomeres and are the smallest functional units in striated muscle
-
-
A-Band
"Dark zone" -contain thick (myosin) filaments. The myosin and actin filaments overlap in peripheral regions of the A band, whereas a middle region (called the H zone) contains only myosin.(do not change length)
I-Band
"Light Zone"-A light band on each side of the Z line of striated muscle fibers, comprising a region of the sarcomere where thin (actin) filaments are not overlapped by thick (myosin) filaments.
-
H-ZONE
The region of a striated muscle fiber that contains only thick (myosin) filaments. The H zone appears as a lighter band in the middle of the dark A band at the center of a sarcomere
-
-
-
