Chapter 13 Flashcards
1
Q
Individual muscle fibers arranged in bundles
A
Fascicles
2
Q
Attach muscle to bone
A
Tendons
3
Q
Less movable point of attachment
A
Origin
4
Q
More movable point of attachment
A
Insertion
5
Q
Does not work
A
Prime mover
6
Q
Aid Prime mover
A
Synergists
7
Q
Act in opposition to Prime mover
A
Antagonist
8
Q
Plasma membrane are called
A
Sarcolemma
9
Q
Extensions of sarcolemma that extend into cytoplasm
A
Transverse tubules
10
Q
Contractile portions of muscle fibers
A
Myofibrils
11
Q
Myofibrils made up of ____
A
Myofilaments
12
Q
Myosin
A
Thick
13
Q
Actin
A
Thin
14
Q
Regions of myofibrils that shorten during contraction
A
Sacromeres
15
Q
Carry electrical impulses from nervous system
A
Motor neurons
