Chapter 11: Muscular System Flashcards
1
Q
prime mover
A
aka agonist: muscle that causes a desired action
2
Q
antagonist
A
muscle that produces an opposite action in regards to the agonist
3
Q
fixator
A
stabilize the origin of the prime mover so that it can act more efficiently
4
Q
synergist
A
- muscle that stabillizes a movement
- prevents unwanted movements
- helps the prime mover function more effectively
5
Q
origin
A
- attachment of muscle to stationary bone
- complex movements where its hard to determine the fixed bone origin is always more proximal attachment
6
Q
insertion
A
attachment of the muscle to the moveable bone
7
Q
brevis
A
short
8
Q
minor
A
smaller
9
Q
minimus
A
smallest
10
Q
vastus
A
huge
11
Q
longus
A
long
12
Q
maximus
A
largest
13
Q
1st class level system
A
- a seesaw
- fulcrum: occiput, C1/C2
- resistance: skull
- effort: contraction of neck
- location: head on the vertebral column
14
Q
2nd class level system
A
- wheelbarrow
- opening mouth
- ex: pushup
- fulcrum: feet
- resistance: body weight
- effort: arms
15
Q
3rd class level system
A
- a forcepts
- fulcrum: elbow
- resistance: what is inn hand
- effort: contraction of biceps brachii
- location: flexing the forearm at the elbow joint
16
Q
fulcrum
A
a fixed point (joint) that a level moves around (bone)
17
Q
resistance (load)
A
opposes movement
- ex: weight of lever or any object on lever that opposes movement
18
Q
effort
A
causes movement
- ex: force exerted to achieve desired action
