Organization of sarcomere Flashcards
1
Q
I band has what only?
A
actin
2
Q
H zone has
A
myosin only
3
Q
M line has
A
myosin linked with accessory proteins
4
Q
A band (outer edge)
A
actin and myosin overlap
5
Q
What happens to sarcomere as muscles relax
A
sarcomere shortens
6
Q
What happens when muscle is contracted
A
H zone and I band both shorten, while A band remains constanty
7
Q
Accessory proteins are
A
titin and nebulin
8
Q
What distance doe titin span?
A
from one z disk to the neighboring M line
9
Q
Whagt distance does nebulin span
A
it doesn’t span a distance. It lies next to thin filaments and attached to a z disk but does not extend to the M line
