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Medical Science Mcqs 5254 MCQs [All-Courses]

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Medical Science is the study of human health, diseases, prevention, and treatment, focusing on diagnosis, patient care, and medical research to improve healthcare outcomes.

All Topics  5254

Oxygen affinity is increased by all except_________________?
A Alkalosis
B Hypoxia
C Increased HbF
D Hypothermia
Correct Answer: Hypoxia
Non- respiratory function of the lung is_________________?
A Dopamine metabolism
B Adrenaline metabolism
C Serotonin metabolism
D PGE2 production
Correct Answer: Serotonin metabolism
Smoking causes_____________?
A Ciliary motility
B Cellular hyperplasia
C Mucous secretion
D All of the above
Correct Answer: All of the above
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
Correct Answer: Herring – Breur reflex
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
Correct Answer: The absolute amount of reduced hemoglobin
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
Correct Answer: Intra thoracic pressure rises
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
Correct Answer: P 50 and oxygen affinity increase
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
Correct Answer: Increase in arterial carbon dioxide level
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
Correct Answer: Rise in pH
Most effective method of assessing breathing is by measuring____________?
A Tidal volume
B Respiratory rate
C Alveolar ventilation
D FEV 1
Correct Answer: FEV 1
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