Top 250+ Solved Respiration MCQ Questions Answer

a. left ventricular failure

b. atelectasis

c. pulmonary fibrosis

d. advancing age

e. raised pulmonary capillary wedge pressure

a. V/Q ratio is greatest at the lung apex

b. V/Q ratio is about one at level of third rib when upright

c. ventilation decreases proportionately more than perfusion from base to apex

d. V/Q ratio for whole lung at rest is about 0.8

e. exercise increases the V/Q ratio

a. apical perfusion is less than basal

b. E.coli endotoxin causes venodilatation

c. total pulmonary blood flow increases 3-6 fold during exercise

d. pulmonary vascular resistance increases at small lung volumes

e. in zone 2, pulmonary arterial pressure is greater than alveolar pressure

a. physiological dead space is normally larger than anatomical dead space

b. basal ventilation is greater than apical

c. normal tide volume is about 7ml/kg

d. airway resistance decreases at large lung volumes

e. total pulmonary ventilation can increase by up to 20 fold during exercise

a. tidal volume = 500ml

b. residual volume = 1200ml

c. expiratory reserve volume = 1000ml

d. inspiratory capacity = 3300ml

e. vital capacity = 4800ml

a. oxygen is about 20 times less soluble in blood

b. deoxygenation of blood increase its ability to carry carbon dioxide

c. arterial blood transports about 20% in dissolved form

d. venous blood has higher haematocrit than arterial blood

e. carbamino compounds are formed by reaction with both plasma proteins and Hb

a. growth hormone

b. phosphate deficiency

c. thyroid hormone

d. exercise for one hour

e. androgens

a. decreased phosphate

b. increased altitude

c. cortisol

d. decreased pH

e. aldosterone

a. type I pneumocytes repair alveolar epithelium

b. pulmonary alveolar macrophages are derived from blood monocytes

c. mast cell membranes bind IgE via Fc portion to heavy chain

d. APUD (neuroendocrine) cells are of endodermal origin

e. type II pneumocytes are membranous

a. prostaglandins

b. noradrenaline

c. acetylcholine

d. adrenaline

e. bradykinin

a. gases generally cross by simple diffusion

b. diffusion capacity for carbon dioxide is much greater than for oxygen

c. nitrous oxide is a diffusion limited gas

d. carbon monoxide does not reach equilibrium in 0.75 seconds

e. oxygen is a perfusion limited gas

a. prostaglandins

b. serotonin

c. dipalmityl phosphatidylcholine

d. histamine

e. kallikrein

a. increased PACO2

b. increased PAO2

c. unchanged PaCO2

d. unchanged PaO2

e. increased PvCO2

a. Reduction quotient

b. Respiratory quotient

c. Reverse quotient

d. None of these

a. l

b. 2

c. 3

d. 4