Skeletal (Voluntary) Muscle Flashcards
1
Q
What is a voluntary muscle?
A
we choose to move it
2
Q
What are 4 features of the skeletal muscle?
A
lots of mitochondria
long cylindrical cells called muscle fires
muscle fibres are multinucleate - have many nuclei
contain long organelles called myofibrils - contain myofilaments - two types of myofilaments called actin and myosin
3
Q
What is the I band?
A
blue part only
actin only
doesnt include overlap with myosin
it is a light colour
actin is thin
4
Q
What is the A band?
A
red part only
all of the myosin
dark in the electron micro-graph
anchor
myosin is thick
5
Q
What is the H zone?
A
unoverlapped myosin filaments
6
Q
What is the sacromere?
A
EVERYTHING between the z lines
