motor Flashcards
1
Q
what controls the activity of the myosin binding sites
A
CALCIUM
2
Q
what are the 3 types of mucles
A
skeletal, smooth, and cardiac
3
Q
what is a single muslce cell called
A
fiber/ myofiber
4
Q
what is a fasicle
A
a bundle of muscle fibers
5
Q
are skeletal muscle uninuclear
A
no - multinuclear
6
Q
what is a myofibril
A
rodlike organelle of a muscle cell that runs along it (many many wi cell)
7
Q
what is a sarcomere
A
repeating unit of a myofibril
8
Q
what is the a band
A
thick and thin filaments
9
Q
what is the i band
A
only thin filaments
10
Q
what is the z line
A
separates sarcomeres
11
Q
what causes the binding of the myosin head to the myosin binding sites
A
ATP
12
Q
what is the importance of ATP hydrolisis in muscle contraction
A
ATP hydrolisis causes a conformational change in the myosin head allowing actin binding
