Involuntary hyperventilation during an anxiety attack can cause a person to become faint because of __________.

decreased O₂ levels in the blood, causing cells to lack adequate ATP synthesis

lowered CO₂ levels in the blood and consequent constriction of cerebral blood vessels

increased temperature caused by increased intercostal muscle activity

increased CO₂ levels caused by an increase in cellular respiration, reducing brain perfusion and causing ischemia

the effects of increased O₂ levels in the blood and the consequent constriction of cerebral blood vessels

Master Control Of Respiration (regulation of breathing) with a bite sized video explanation from Armando Hasudungan