A. Stagnant hypoxia
B. Anemic hypoxia
C. Histotoxic hypoxia
D. Hypoxic or arterial hypoxia
Arterial O2 content is reduced in one of following ______________? Read More »
Medical Mcqs, Physiology Mcqs, Respiratory System A. Alkalosis
B. Hypoxia
C. Increased HbF
D. Hypothermia
Oxygen affinity is increased by all except_________________? Read More »
Medical Mcqs, Physiology Mcqs, Respiratory System A. Dopamine metabolism
B. Adrenaline metabolism
C. Serotonin metabolism
D. PGE2 production
Non- respiratory function of the lung is_________________? Read More »
Medical Mcqs, Physiology Mcqs, Respiratory System A. Ciliary motility
B. Cellular hyperplasia
C. Mucous secretion
D. All of the above
Smoking causes_____________? Read More »
Medical Mcqs, Physiology Mcqs, Respiratory System A. Autonomic reflex
B. Bainbridge reflex
C. Herring – Breur reflex
D. Dynamic stretch reflex
Limitation of inspiration by vagal lung inflation signals is called the______________? Read More »
Medical Mcqs, Physiology Mcqs, Respiratory System A. The relative proportion of reduced and oxygenated hemoglobin
B. The absolute amount of reduced hemoglobin
C. Thickness of the skin
D. Fragility of capillaries
Cyanosis or bluish coloration of skin and mucus membrane depends upon______________? Read More »
Medical Mcqs, Physiology Mcqs, Respiratory System A. Intrapulmonary pressure falls
B. Intra thoracic pressure rises
C. Intra-abdominal pressure rises
D. The partial pressure of O2 in dead space rises
During the initial part of inspiration, which of the following does not occur ? Read More »
Medical Mcqs, Physiology Mcqs, Respiratory System A. P50 and oxygen affinity decrease
B. P 50 and oxygen affinity increase
C. P 50 decreases and the oxygen affinity increases
D. P50 increase and the oxygen affinity decreases
What effect does hyperventilation have on the oxygen binding affinity of hemoglobin ? Read More »
Medical Mcqs, Physiology Mcqs, Respiratory System A. Decrease in arterial carbon dioxide level
B. Increase in arterial carbon dioxide level
C. Increase in arterial oxygen level
D. None of the above
The best stimulator of respiratory center is____________? Read More »
Medical Mcqs, Physiology Mcqs, Respiratory System A. Rise in temperature
B. Rise in carbon dioxide tension
C. Rise in pH
D. Rise in H+ ion
