antagonistic pairs and skeletal muscles Flashcards
1
Q
what do muscles act in ?
why?
A
- antagonistic pairs in an incompressible skeleton
- so a limb can move in both directions bc muscles can only pull
2
Q
ligaments
A
bones to bones
3
Q
tendons
A
bones to muscles
4
Q
skeletal muscles have
A
- lots of mitochondria
- muscle fibres
5
Q
2 key points about organelles in muscle fibres
A
- they are multinucleate
- they contain long organelles called myofibrils
6
Q
myofibrils contain
A
myofilaments
7
Q
I band
A
- actin only, no overlap w myosin
- light
8
Q
A band
think amy
A
- all of the myosin
- dark
9
Q
H - zone
A
unoverlapped myosin
10
Q
the sarcomere
A
everything between z lines
