Question

In: Anatomy and Physiology

You need to draw a 1-page chart with the 3 muscle fiber types. You need to...

You need to draw a 1-page chart with the 3 muscle fiber types. You need to include the type and size of that neuron that innervates that muscle. The predominant way ATP is produced for that muscle fiber type and 3 activities that are associate with that muscle fiber type.

Solutions

Expert Solution

Features Type 1 Type 2A Type 2B
Other names Slow oxidative Fast oxidative glycolytic (FOG) Fast Glycolytic (FG)
Type of neuron innervating the muscles Motor neuron Motor neuron Motor neuron

Size of neuron

Small Intermediate High
ATP production ATP ( Derived from blood glucose + Free fatty acids ) is major source throughout .Aerobic Respiration is used for ATP production . Aerobic Respiration but sometimes switch to Aerobic glycolyis . Anerobic glycolysis .
Glucose- is derived from

Blood glucose -4 minutes

Liver Glycogen -18 min

Muscle glycogen-70 min

Triglyceride of fatty tissue -4000min

Muscle gycogen metabolised by anerobic glycolyis Muscle Glycogen and metabolised by anerobic glycolysis.
Colour Red Red White
Myosin ATP ase activity Slow Fast Fast
Oxidative capacity ,myoglobin content ,mitochondria ,capillary density High High Low
Glycolytic capacity Moderate High

High

Fatguability Fatigue late (resistant) Fatigue early ( Resistant ) Fatigue earliest (fatiguable )
FUNCTION

FOR LONG SLOW CONTRACTIONS

So it is used In Marathon runners

FOR FINE SKILLED MOVEMENTS

It is used for sprinter(100 m runner )

For FIne skilled movements

Sprinter (100 m runner ).

Other functions Maintain posture ,Bones and joint Stabilising,Small joints movement ,Isometric contraction Used for walking Used for rapid contractions for short time as it is fatigued easily .

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