Why do our limb grain stingy (like ant bites) after a time of ischemia?
Answers: Your limbs jump numb after restricted blood flow, because red blood cells contain oxygen that your limb cannot be deprived of for extended periods of time. Most human cell require ample oxygen because of their energy requirements. In the absenteeism of oxygen, cells use smaller number efficient energy-generating pathway (glycolysis rather than Krebs and eventually electron transport) which are insufficient to hold on to the tissues of your limbs alive. Your sensory brass neck cells also require blood flow and as such can sense deprivation of oxygen. When blood flow is restored, your sensory receptors are temporarily overactivated, explaining that "emotion."
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