Medical MCQs

5099 MCQs  (Page 459 of 510)

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
Smoking causes_____________?
A. Ciliary motility
B. Cellular hyperplasia
C. Mucous secretion
D. All of the above
Non- respiratory function of the lung is_________________?
A. Dopamine metabolism
B. Adrenaline metabolism
C. Serotonin metabolism
D. Pge2 production
Tubuloglomerular feedback occurs in______________?
A. Adh secretion in collecting duct
B. Constant solute load on distal tubule
C. Macula densa
D. Balance between ascending and descending loop of henle
During inspiration when the diaphragm contracts, the intrapleural pressure becomes_____________?
A. More negative
B. Less negative
C. Positive
D. Equal to the intra alveolar pressure
Most effective method of assessing breathing is by measuring____________?
A. Tidal volume
B. Respiratory rate
C. Alveolar ventilation
D. Fev 1
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
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