Ch 10 Flashcards
1
Q
Whole skeletal muscle
A
Epimysium
2
Q
Surrounds a fasicle
A
Perimysium
3
Q
Surrounds individual muscle fibers within muscle fasicle
A
Endomysium
4
Q
Less movable bone
A
Origin
5
Q
Where bone moves
A
Insertion
6
Q
Make up individual muscle cells
A
Myofibrils
7
Q
Each myofibril is organized into repeated segments
Basic unit of contraction
A
Sarcomere
8
Q
Outer boundaries
Attached to each & extend toward sarcomere are actin
A
Z line
9
Q
Make up sarcomere
A
Actin and myosin
10
Q
Overlapping actin and myosin
Darker portions of striations
A
A band
11
Q
Only thin actin
Lighter region of striations
A
I band
12
Q
Only myosin thick, expands from M line
A
H line
13
Q
Crosses middle of H zone attachment point for myosin
A
M line
14
Q
Smooth ER of muscle cells
Surround each myofibrils
A
Tubules of SR
15
Q
End portion of SR
Stores Ca
A
Terminal cisterns
