| if the respiratory rate of 'A' is 35 breaths/min and tial volume 185cc/ breath and of 'B' is 25 breaths/min and tidal volume 259 cc/breath then | pulmonary ventilation of 'a' is greater than 'b' |
| during oxygen transport the oxyhaemoglobin at the tissue level librates oxygen to the cells because in tissue | O2 tension is low and CO2 tension is high |
| pleura is a | double membraned structure |
| respiration results in | release of CO2 |
| maximum expiration after full inspiration is called | vital capacity |
| amount of oxygen present in one gm of haemoglobin is- | 1.34 ml |
| in which of the follwong sequence is the CO2 diffused out of the body | endothelium-->basement membrane-->squamous epithelium |
| in which of the following the partial pressure of O2 is 95 mm of Hg - | pulmonary vein and systemic arteries |
| trachea gets divided into left and right primary bronchi at the level of - | 5th thoracic vertebra |
| chemosensitive area situated adjacent to rhythm centre is highly sensitive to | CO2 and H+ |
| TV+ERV is- | EC |
| the enzyme, carbonic anhydrase is found in | more in erthyrocytes and less in plama |
| trachea is a straight tube extending up to the | anterior of thorasic cavity |
| the total volume of air accommodated in the lungs at the end of forced expiration is sum total of | IRV+TV+RV |
| the partial pressure of oxygen in alveolar air and oxygenated blood respectively | 104mm Hg and 95 mm Hg |
| about 97 per cent of O2 is transported by | RBC's in the blood |
| the amount of O2 delivered by 100 ml blood to the tissue under normal physiological condition | 5 ml |
| oxygen carried by blood is liberated in | heart |
| in which known animal respiration occurs without respiratory organ | fish |
| the conducting part of respiratory system extends upto | respiratory bronchioles |
| after taking a long deep breath we do not respire for some seconds due to | less CO2 in blood |
| if expiratory reserve volume is 1100 ml residual volume is 1200 ml and tidal volume is 500 ml, what shall be the functional residual capacity | 1600 |
| residual air mostly occurs in | bronchus |
| for proper transport of O2 and CO2 blood should be | slightly alkaline |
| what would happen when blood is acidic | oxy-haemoglobin curve shifted toward right |
| respiratory process is regulated by certain specialised centres in the brain one of the following listed centres can reduce the inspiratory duration upon stimulation | medullary expiratory centre |
| which factor is favourable for the formation of oxyhaemoglobin in the alveoli | lower temperature |
| chloride shift occurs in response to | HCO3- |
| vital capacity of lungs is | TV+IRV+ERV |
| the type of tissue lining the nasal passage, bronchioles and fallopian tubes is | columnar ciliated epithelium |
| residual volume is | greater than tidal volume |
| covering over lungs is called | pleura |
| increasing order of volumes | tidal<residual<inspiratory<vital |
| wha is the vital capacity of our lungs | total respiratory volume-residual volume |
| which of the following factors raise the P50 valve and shifts the HbO2 dissociation curve to the right | rise in Pco2 and H+(fall in pH) |
| hypoxia is the condition in which less oxygen become available to the tissues, this may be due to | less oxygen in atmosphere, more CO2 in air and less RBC'S in blood |
| in a healthy person the haemoglobin contents more than | 25gms/100ml |
| percentage of CO2 carried by human RBC | 20-25 per cent |
| choride shift is essential for the transportation of | CO2 |
| 70 per cent of CO2 is transported in blood in the form of | bicarbonate |
| fill in the blanks | A-159, B-40, C-40, D-40, E-40 |
| if pH of blood falls the P50 value of haemoglobin will be | increased |
| in the lungs pneumocyte type-II cell secrete lecithin. what will happen when these cells become inactive | alveoli get collapsed |
| incomplete cartilaginaous rings present in- | trachea and primary bronchus, secondary bronchi and tertiary bronchi |
| is diffusion of O2 and CO2 a function of conducting part of human respiratory system | non |
| low pCO2 , lesser H+ concentration and lower temperature enhance | affinity of O2 with Hb and hence O2-Hb dissosiation curve shifts to the left side |
| reduction in pH of blood will | decrease the affinity of haemoglobin with oxygen |
| the partial pressure of oxygen in the alveoli of the lungs is | more than that in the blood |
| lungs do not collapse between breaths and some air always remains in the lungs which can never be expellled because | there is -ve intraapleural pressure pulling at the lung walls |
| which reaction occur in pulmonary cappilaries | Hb+O2---->HbO2 |
| carbon dioxide is transported from tissues to respiratory surface by only | erythrocytes |
| a large proportion of oxygen is left unused in the human blood even after its uptake by the body tissues, this O2 | acts as a reserve during muscular exercise |
| what is a possibility for most of us in regard to breathing , by making a conscious effort | one can breathe out air through eustachian tubes by closing both the nose and mouth |
