Tachycardia is caused by hypoxia due to: (A) Reflexly through peripheral chemoreceptors, (B) Diffuse vasodilation, (C) Through central chemoreceptor, (D) Secondarily after by hyperventilation
Answer is D. Tachycardia and vasodilation occur secondary to hyperventilation in cases of hypoxia. Central chemoreceptors do not have a role in hypoxia. Activation of peripheral chemoreceptors excites medullary vagal centre and causes Bradycardia.