Skeletal Muscle Mechanics Flashcards
The greater the preload the greater or less the passive tension of the muscle?
the greater the passive tension
What is isotonic contraction?
When muscle shortens because it generates more force than acting upon
What isometric contraction?
When a muscle won’t shorten because it is unable to generate more force than its working against
What are some characteristics of white muscle?
large mass per motor unit
high ATPase acitivity
high capacity for anaerobic glycolysis
low myoglobin
Examples of white muscle?
ocular muscles
leg muscles in sprinters
What are some characteristics of red muscle?
small mass per motor unit
lower ATPase activity (slower muscle)
high capacity for aerobic metabolism (mitochondria)
high myoglobin (imparts red color)