2.2 What causes muscle fatigue

What is glycogen production selective to

muscle groups involved in the activity

What are the two mechanisms of this process

running out of fuel and buildup

What happens when pH falls below 6.9

the cellular processes of energy in production and muscle contraction begin to slow

Why does this happen

there is a break in the chain of events in muscular contraction

What is buildup

accumulation of metabolic by-products

What is peripheral muscle fatigue caused by

inability for the body to supply sufficient energy or other metabolites to the contracting muscles to meet the increased energy demand

What happens due to leakage of ACH and Calcium

insufficient levels lead to reduced muscular recruitment and contractions

What are the possibilities for central fatigue

interruption in motor coordination, inhibition of voluntary effort, psychological factors, pain perception and tolerance, neural malfunction, interference in the basal ganglia

What are the two types of fatigue

Central and Peripheral

What is running out of fuel

Depletion of neurotransmitters and energy sources

What does glycogen depletion from type I and type II fibers depend on

Duration and intensity of the activity

What do the muscles operate best at (pH)

6.9-7.1

What do we need for a muscular contraction

ACH to bind at the neuromuscular junction, calcium dependent binding, ATP release

What kind of byproducts effect pH balance

Hydrogen and Lactic acid

What does energy depletion cause to happen

Impaired ATP production

What are the neural malfunctions

Membrane potentials are unable to reach sufficient levels to continue to send action potentials

What happens when the pH gets below 6.4

Myosin can no longer bind to actin, muscle contraction stops

What are the psychological factors that could effect central fatigue

Perception and tolerance

What happens to energy production systems during exercises

Produce many metabolic byproducts

What does fatigue result in

The cessation of muscular work or the inability to maintain a given intensity of work