Muscles Flashcards
1
Q
what are the organisation levels of skeletal muscles
A
muscle fascicle myofibril sacromere contractile proteins - myosin and actin
2
Q
what are muscle fibres covered by
A
endomysium
3
Q
what is each fascicle covered by
A
perimysium
4
Q
what are other properties of cardiac muscle
A
- long
- thick
- can self excite
- uniform in diameter? could vary in diameter
5
Q
what are places that smooth muscle is
A
colon oesophagus stomach bladder small intestine
6
Q
what do smooth muscles become as they contract
A
shorter and thicker
7
Q
what are smooth muscles innervated by
A
the autonomic nervous system
8
Q
what is the diaphragm made out of
A
striated somatic muscle (skeletal muscle)
9
Q
what is the structure of smooth muscle
A
- have a skeleton of intermediate fibres that criss cross over their surface connected by dense bodies
10
Q
why do smooth muscle have both circular and longitudinal layers
A
so they can both dilate and shorter when the organ contracts
- aids perstasis
