Physiology Which of the following is TRUE regarding vascularity of lung? A Hypoxia causes vasodilation B Ratio of pulmonary to systemic vascular resistance is usually more than 0.3 C Perfusion is more in the apical lobe than in base D The blood flow is less in the upper pa of the lungs 💡 Explanation Which of the following is TRUE regarding vascularity of lung? ✓ Correct Answer: D. The blood flow is less in the upper pa of the lungs