cardiac muscles Flashcards
1
Q
myofibrils are
A
tube like structure arranged in bundles of sarcomeres
2
Q
sarcomeres are
A
contractile sub-units of the myofibrils
3
Q
each sarcomere is divided by a “ “
A
z line
4
Q
A bands within the sarcomere contain ___
A
actin
5
Q
I bands within the sarcomere contain
A
myosin
6
Q
actin and myosin are
A
muscles proteins
7
Q
____ provides the energy for muscle contraction
A
ATP (adenosine triphosphate)
8
Q
sarcoplasmic reticulum are
A
mesh like structure that surrounds the myofibrils
9
Q
sarcoplasmic reticulum stores
A
Ca++
10
Q
T tubules are
A
tubes that carry impulses to the sarcoplasmic reticulum
