Lecture 4: Muscle Tissue and Muscles Flashcards
1
Q
What is an agonist?
A
Muscle doing desired action.
2
Q
What is an antagonist?
A
Muscle that opposes desired action.
3
Q
What is a synergist?
A
Muscle that eliminates unwanted action of the agonist.
4
Q
What is a fixator?
A
Stabilizes the point of attachment of the agonist.
5
Q
What are the characteristics of slow twitch (red) fibers?
A
- slower movement
- higher endurance
- more mitochondria
- primarily uses aerobic respiration
- more myoglobin
- smaller concentrations of ATPase
6
Q
What are the characteristics of fast twitch (white) fibers?
A
- faster movement
- lower endurance
- fewer mitochondria
- primarily uses anaerobic respiration resulting in lactic acid build up
- little myoglobin
- larger concentrations of ATPase
7
Q
What are the different banding patterns of a sarcomere?
A
Z line/disc, I bands, A bands, and H bands
