Flashcards in Muscle Deck (21):
Endomysium make up
CT: reticular fibers and external lamina
What is a muscle fascicle
Group of muscle fibers
Does skeletal muscle regenerate?
Yes-via satellite cells
Does cardiac muscle regenerate?
T tubules in cardiac muscle located?
At Z line
T tubules in skeletal muscle located at?
Junction of A-I bands
Seen in cardiac muscle
One T tubule (at Z line) and one part of SR terminal end
Cardiac muscle and mitochondria
Mito is very abundant in CM. Almost half of cell volume.
What's at the ends of cardiac muscle?
Intercalated discs. Junction between cells ends=gap junctions that allows communication.
What muscles have and lack myofibrils
Describe T tubules of the muscles
T tubules at junction of A-I bands
T tubules at Z lines
Lack T tubules
What muscle is able to secrete ECM. What cell is this similar to in ECM production regards
Similar to fibroblast
Cab smooth muscle regenerate?
Yes all byyyyyy themmmmselves
Pericytes can help too though.
What muscles have myofribrils and myofilaments
Cardiac and skeletal muscle have both
Smooth only has myofilaments (which are not highly organized). Lacks troponin
Dense body in smooth muscle
Unitary muscle smooth muscle
Few cells are innervated (works as syncytium via gap junctions). Muscle fibers form as band or bundles