Role of troponin and tropomyosin Flashcards
1
Q
What is it called when the strands move to shorten and contract
A
Sliding filament theory
2
Q
Sarcomeres are made up of actin and myosin but what do they also contain
A
Tropomyosin and troponin
3
Q
What is tropomyosin
A
A fibrous protein found intertwined on the actin filaments in skeletal muscle
4
Q
What is troponin
A
A globular protein found on tropomyosin. With a Ca2+ binding site
5
Q
What happens when Ca2+ binds to troponin
A
It helps shift tropomyosin to allow movement
6
Q
What are the 4 proteins that facilitate skeletal muscle contraction are
A
Actin, myosin, troponin and tropomyosin
