06. Muscle Structures Flashcards
1
Q
Fasciculi
A
bundles of muscle cells surrounded by fascia
2
Q
Muscle fiber
A
cell making up muscle
3
Q
Myofibril
A
groups of muscle proteins surrounded by sarcoplasmic reticulum
4
Q
Myofilaments
A
basic molecular structure of muscle
5
Q
Actin
A
muscle protein involved in contraction
6
Q
Myosin
A
muscle protein with branches that connect to actin
7
Q
sarcoplasmic reticulum
A
membrane bound channels with muscle cells that store calcium
8
Q
Transverse (T) tubules
A
Deep invagination of the sarcolemma, which is the plasma membrane, only found in skeletal and cardiac muscle cells. These invaginations allow depolarization of the membrane to quickly penetrate to the interior of the cell.
9
Q
Sarcolemma
A
outer membrane wall of muscle cells
10
Q
Troponin
A
protein molecule attached to actin in muscle cells
