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Breathing and Respiration



mcqs by everyone

SARS is caused by variant of


Oxygen dissociation curve of haemoglobin is


Respiratory centre of brain is stimulated by


Carbon dioxide entering erythrocytes reacts with water to form carbonicacid.
the enzyme is


Teh alveolar epithelium in the lung is


Percentage of oxygen being carried by blood plasma is


Oxygen and carbon dioxide is transported in blood through


Vocal cord occur in


According to Boyle's law, the product of pressure and volume is constant, hence


Alveoli become enlarged and damaged with reduced surface area in heavysmokers.
the condition is called


At higher CO2concentration.
oxygen dissociation curve of haemoglobin will


At a given O2 concentration, dissociation of oxyhaemoglobin will increase if


Emphysema is characterised by


Approximately seventy percent of carbon dioxide absorbed by the blood will be
transported to the lungs:


In alveolar air, partial pressure of CO2 is


Partial pressure below arterial pO2 causes


Skin is an accessory organ of respiration in


In which of the following in which the iron in the heme group is in the Fe3+ (ferric) state


Enzyme essential for transport of CO2 as bicarbonate in blood is


Assertion : Haemoglobin is an oxygen carrier
Reason : Oxygen binds as O2- to Fe of haemoglobin


Fish brought out of water dies because of


Match the columns ..


Column I
Column II



(a) Asthma
(p) Recurring of bronchitis



(b) Emphysema
(q) Accumulation of WBCs in alveoli



(c) Pneumonia
(r) Allergy




Respiratory system is derived from


Respiratory membrane consists of ..... [


Body tissues obtain oxygen from haemoglobin because of its dissociation in tissues caused by


Whether a child died after birth or died before birth can be confirmed by measuring


Diffusion of oxygen in tissues of cockroach occurs through


Bicarbonate formed inside erythrocytes passes out into plasma while chloride of plasma pass intoerythrocytes.
the phenomenon is called


When oxygen supply to tissue is inadequate, the condition is


Rate of respiration is directly affected by