overview of muscle cells Flashcards
1
Q
muscle cells are called fibers because
A
of their threadlike shape
2
Q
Sarcolemma
A
plasma membrane of muscle fibers
3
Q
Sarcoplasmic reticulum (SR)
A
stores calcium
4
Q
T -tubules
A
network of tubules and sacs found within muscle fibers
5
Q
Muscle fibers contain many
A
mitochondria (ATP) and several nuclei
6
Q
Myofibrils
A
numerous fine fibers packed close together in sarcoplasm
7
Q
Sarcomere
A
Segment of myofibril between two successive Z disks
8
Q
Each myofibril consists of many
A
sarcomeres
9
Q
shorten
A
contraction
