Title 17. BREATHING AND EXCHANGE OF GASES.pdf ✅

PAPER 1 (1.) Which of the following structures close the glottis during swallowing to prevent the entry of food into wind pipe. (1) Tongue (2) Epiglottis (3) Diaphragm (4) Larynx (2.) Match Column - I with Column - II and select the correct option from the codes given below : Column - I Column - II (Animals) (Respiratory structures) (A) Spiders (i) Gills (B) King crab(ii) Book lungs (C) Prawn (iii) Books gills (D) Labeo (1) A-(iii), B-(i), C-(ii), D-(ii) (2) A-(ii), B-(iii), C-(i), D-(i) (3) A-(i), B-(ii), C-(iii), D-(ii) (4) A-(i), B-(iii), C-(i), D-(ii) (3.) Lungs are enclosed in : (1) Perichondrium (2) Pericardium (3) Pleural membrane (4) Peritoneum (4.) Vital capacity of lungs is : (1) IRV + ERV (2) IRV + ERV + TV - RV (3) IRV + ERV + TV + RV (4) IRV + ERV + TV (5.) Which of the following changes occur in diaphragm and intercostal muscles when expiration of air takes place? (1) External intercostal muscles relax and diaphragm contracts (2) External intercostal muscles contract and diaphragm relaxes (3) External intercostal muscles and diaphragm relax (4) External intercostal muscles and diaphragm contract (6.) Match column - I with column - II and select the correct option from the codes given below : Column - I Column - II A. TV + ERV (i) Expiratory capacity B. RV ERV TV + + (ii) Total lung capacity + IRV C. ERV RV + (iii) Functional residual capacity
(1) A - (i), B - (ii), C - (iii) (2) A - (iii), B - (i), C - (ii) (3) A - (iii), B - (ii), C - (i) (4) A - (ii), B - (iii), C - (i) (7.) Match the column - I with column - II and select the correct option from the codes given below : Column - I Column - II A. Tidal volume (i) 2500 3000 mL − of air B. Inspiratory reserve volume (ii) 1000 mL of air C. Expiratory reserve (iii) 500 mL of air volume D. Residual volume (iv) 4000 4600 mL − of air E. Vital capacity (v) 1100 1200 mL − − of air (1) A-(iii), B-(iv), C-(ii), D-(i), E-(v) (2) A-(iii), B-(i), C-(ii), D-(v), E-(iv) (3) A-(iii), B-(i), C-(iv), D-(v), E-(ii) (4) A-(v), B-(i), C-(ii), D-(iii), E-(iv) (8.) During expiration the diaphragm becomes : (1) Dome - shaped (2) Oblique (3) Normal (4) Flattened (9.) The inspiratory reserve volume + tidal volume + expiratory reserve volume is the same as : (1) Inspiratory capacity + expiratory reserve volume (2) Total lung capacity - functional residual capacity (3) Inspiratory capacity + functional rersidual capacity (4) Inspiratory capacity + residual volume (10.) Which of the following is true for CO2 concentration? (1) More in alveolar air than in expired air (2) More in expired air than in alveolar air (3) More in inspired air than in alveolar air (4) More in inspired air than in expired air (11.) The enzyme that increases the reaction rate between CO2 and H O2 in red blood cells is : (1) Carbonic anhydrase (2) Adenylate cyclase (3) Carbonic synthetase (4) Alkaline phosphatase (12.) The partial pressure of oxygen is maximum in :
(1) Alveolar air (2) Arterial blood (3) Venous blood (4) Expired air (13.) Pneumotaxic centre which can moderate the functions of the respiratory rhythm centre is present at : (1) Pons region of brain (2) Thalamus (3) Spinal cord (4) Right cerebral hemisphere (14.) Match the column - I with column - II and select the correct option from the codes given below : Column - I Column - II (A) Fish (i) Larynx (B) Biologically useful energy (ii) Alveolar air Po2 (C) 104 mmHg (iii) Branchial respiration (D) Vocal cords (iv) ATP (1) A-(iii), B-(iv), C-(ii), D-(i) (2) A-(iv), B-(ii), C-(iii), D-(i) (3) A-(iii), B-(iv), C-(i), D-(ii) (4) A-(i), B-(ii), C-(iv), D-(iii) (15.) Emphysema is a condition resulting from : (1) Cigarette smoking (2) Liquor consumption (3) Drug addiction (4) Reduced oxygen carrying capacity of blood (16.) How many matching is/are correct Gill filaments - Fish Cutaneous respiration - Earthworm Diaphragm - Inspiration (1) One (2) Two (3) Three (4) None of these (17.) It is known that exposure to carbon monoxide is harmful to animals because (1) It reduces CO2 transport (2) It reduces O2 transport (3) It increases CO2 transport (4) It increases O2 transport (18.) Mark the true statement among the following with reference to normal breathing (1) Inspiration is a passive process where as expiration is active (2) Inspiration is a active process where as expiration is passive (3) Inspiration and expiration are active processes
(4) inspiration and expiration are passive processes (19.) Mark the incorrect statement in context to O2 binding to Hb . (1) Higher H + conc. (2) Lower temperature (3) Lower 2 pCO (4) Higher 2 pO (20.) Respiratory process is regulated by certain specialized centres in the brain. One of the following listed centres can reduce the inspiratory duration upon stimulation (1) Medullary inspiratory centre (2) Pneumotaxic centre (3) Apneustic centre (4) Chemosensitive centre (21.) CO2 dissociate from carbamino haemoglobin when : (1) 2 pCO is high & 2 pO is low (2) 2 pO is high and 2 pCO is low (3) 2 pCO and 2 pO are equal (4) None of the above (22.) Match the following and mark the correct options Animal Respiratory Organ A. Earthworm (i) Moist cuticle B. Aquatic Arthropods (ii) Gills C. Fishes (iii) Lungs D. Birds/Reptiles (iv) Trachea (1) A-(ii), B-(i), C-(iv), D-(iii) (2) A-(i), B-(iv), C-(ii), D-(iii) (3) A-(i), B-(iii), C-(ii), D-(iv) (4) A-(i), B-(ii), C-(ii), D-(iii) (23.) Pharynx opens through the larynx region into (1) nasal chamber (2) trachea (3) sound box (4) none of these (24.) In the given diagram A and B are