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Medical Mcqs

Arterial O2 content is reduced in one of following ______________?

August 4, 2021July 8, 2019 by admin
Arterial O2 content is reduced in one of following ______________?

A. Stagnant hypoxia
B. Anemic hypoxia
C. Histotoxic hypoxia
D. Hypoxic or arterial hypoxia

Categories Medical Mcqs, Physiology Mcqs, Respiratory System

Oxygen affinity is increased by all except_________________?

August 4, 2021July 8, 2019 by admin
Oxygen affinity is increased by all except_________________?

A. Alkalosis
B. Hypoxia
C. Increased HbF
D. Hypothermia

Categories Medical Mcqs, Physiology Mcqs, Respiratory System

Non- respiratory function of the lung is_________________?

August 4, 2021July 8, 2019 by admin
Non- respiratory function of the lung is_________________?

A. Dopamine metabolism
B. Adrenaline metabolism
C. Serotonin metabolism
D. PGE2 production

Categories Medical Mcqs, Physiology Mcqs, Respiratory System

Smoking causes_____________?

August 4, 2021July 8, 2019 by admin
Smoking causes_____________?

A. Ciliary motility
B. Cellular hyperplasia
C. Mucous secretion
D. All of the above

Categories Medical Mcqs, Physiology Mcqs, Respiratory System

Limitation of inspiration by vagal lung inflation signals is called the______________?

August 4, 2021July 8, 2019 by admin
Limitation of inspiration by vagal lung inflation signals is called the______________?

A. Autonomic reflex
B. Bainbridge reflex
C. Herring – Breur reflex
D. Dynamic stretch reflex

Categories Medical Mcqs, Physiology Mcqs, Respiratory System

Cyanosis or bluish coloration of skin and mucus membrane depends upon______________?

August 4, 2021July 8, 2019 by admin
Cyanosis or bluish coloration of skin and mucus membrane depends upon______________?

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

Categories Medical Mcqs, Physiology Mcqs, Respiratory System

During the initial part of inspiration, which of the following does not occur ?

August 4, 2021July 8, 2019 by admin
During the initial part of inspiration, which of the following does not occur ?

A. Intrapulmonary pressure falls
B. Intra thoracic pressure rises
C. Intra-abdominal pressure rises
D. The partial pressure of O2 in dead space rises

Categories Medical Mcqs, Physiology Mcqs, Respiratory System

What effect does hyperventilation have on the oxygen binding affinity of hemoglobin ?

August 4, 2021July 8, 2019 by admin
What effect does hyperventilation have on the oxygen binding affinity of hemoglobin ?

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

Categories Medical Mcqs, Physiology Mcqs, Respiratory System

The best stimulator of respiratory center is____________?

August 4, 2021July 8, 2019 by admin
The best stimulator of respiratory center is____________?

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

Categories Medical Mcqs, Physiology Mcqs, Respiratory System

Oxygen dissociation curve shifts to the right by all of the following except_____________?

August 4, 2021July 8, 2019 by admin
Oxygen dissociation curve shifts to the right by all of the following except_____________?

A. Rise in temperature
B. Rise in carbon dioxide tension
C. Rise in pH
D. Rise in H+ ion

Categories Medical Mcqs, Physiology Mcqs, Respiratory System
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