muscle work Flashcards
1
Q
A
2
Q
excitability
A
respond to chemicals released from nerve cells
3
Q
conductivity
A
ability to propagate electrical signals over a membrane
4
Q
contractility
A
ability to shorten and generate force
5
Q
what are myofibrils
A
- make up muscles
- made of actin and myosin
- overlap called sarcomere
6
Q
contractile proteins
A
- actin
- myosin
7
Q
regulatory proteins
A
turn contraction on and off
- troponin
- tropomyosin
8
Q
structual proteins
A
alignment, elasticity and extensibility
- titin
- myomesin
- nebulin
- dystrophin
9
Q
actin filament
A
- made up of actin, troponin and tropomyosin
- myosin-binding site on each actin molecule covered by tropomyosin in relaxed muscle
10
Q
sliding filament theory
A
- myosin binds onto thin filaments
- thin filaments slide inwards
- z discs come towards eachother
- sarcomeres shorten, muscle fiber shortens, muscle shortens
