Muscular System 2 Flashcards
1
Q
Describe Elastic Filaments:
A
Made up of TITIN, an elastic protein, spring shapped
2
Q
Titans run through:
A
The core of each thick filament to prevent over stretching
3
Q
Actin and Myosin are found?
A
In all cells, but are in abundance in muscle cells
4
Q
Define Striations:
A
Actin & Myosin organized as alternating light & dark bands
5
Q
Define A bands:
A
Dark areas w/ thin & thick filaments overlapping
6
Q
Define I bands:
A
Light areas w/ elastic & thin filaments overlapping
7
Q
Define Z lines:
A
zig-zag bisecting each I- band
acts as an anchor for thin & elastic filaments
8
Q
Define a Sarcomere:
A
The functional unit of a myocyte
consists of segments of myofribril b/w 2 z lines
9
Q
Each Myofibril is made up of?
A
thousands of sarcomeres lined up end to end
