Velocity and Duration of Contraction

How are skeletal muscle cells classified

Slow oxidatve fibers, fast oxidative fibers, and fast glycolytic fibers

What muscle fibers are best for endurance type activities

Slow oxidative fibers

What makes a msucle fiber "fast" or "slow"

How fast their myosin ATPases split ATP; the electrical patterns of their motor neurons; how quickly Ca2+ is moved from cytosol to sER during contraction

What are oxidative fibers

use aerobic pathways for ATP generation

What are glycolytic fibers

use anaerobic glycolysis and creatine phosphate

What muscle fiber is best suited for short, rapid intense movements

Fast glycolytic fibers

When do msucles contract fastest

When there is no load

What does a greater load during muscle contraction result in

A greater latent period, slower shortening, nd briefer duration of shortening