When we are engaged in intense physical activity such as running or riding a bike, the muscles need energy to function and they get this from aerobic respiration.
They will quickly run out of the oxygen required to sufficiently use aerobic respiration however and will turn to anaerobic respiration which can produce energy in the absence of oxygen.
As the body uses anaerobic respiration however, lactic acid is produced and builds up in the muscles. It is this lactic acid that leads to the muscles feeling sore.
The reason the Indo- European languages dominated the globe geographically today was that <span> 'B) European colonization around the world helped spread the languages.'</span>
<span>A barometer would indicate a low air pressure in a snowstorm. The thermometer would also indicate a low temperature by showing a drop in temperature because of a cold weather. Both would support each other through its given data in Richmond.</span>
