Muscle Structure Flashcards
0
Q
Myofilaments
A
Make up sacromeres
1
Q
Muscle fibers
A
Banded striated appearance. Each fiber is a single cell in the muscle
2
Q
Sarcolemma
A
Membrane around muscle cell
3
Q
Sarcoplasm
A
Cell membrane of muscle cell
4
Q
Epimysium
A
Covering of muscle bundle
5
Q
Fascicle
A
Inside muscle bundle
6
Q
Perimysium
A
Covering of fasicle
7
Q
Endomysium
A
Covering of muscle fiber
8
Q
Sacromere
A
Contractile unit, found in myofibril. Has a and I bands.
9
Q
Myofibril
A
Composes muscle fibers
10
Q
Actin
A
Type of myofilament, thin
11
Q
Myosin
A
Type of myofilament, thick
12
Q
Sarcoplastic reticulum
A
Like a smooth ER. Surrounds each myofibril. Regulates intercellular calcium levels
13
Q
T tubule
A
Transverse tubules. Allows extra cellular fluid to move throughout the fiber
14
Q
Origin
A
Attachment of muscle. Occurs at the less movable bone
