Which of the following statement correctly describes the respiratory tract ?
I the right lung is larger than the left
II expiration is predominantly a passive phenomenon
III air enters the lungs because of created negative pressure

Which of the following statements best describes the stereochemical relationships of compound I, II and III shown below ?

which of the following statements are correct . ? (i) Fishes respire with the lungs . (ii) A water breather expends much nore energy in ventilating its respiratory surface than an air- breathing one. (iii) Lungs become empty after forceful expiration. (iv) A rise in Po_(2) increase the affinity of haemoglobin for oxygen. (v ) Lactic acid is produced in anaerobic respriation . (vi) Exchange of gases in the lungs is interrupted during expiration. (vii) A molecule of haemoglobin can carry 1-4 molecules of oxygen. (viii) maximum contraction of diaphragm causes maximum expiration. (ix) Respiratory movements are controlled by CO_(2) concentration of arterial . blood. (x ) Tidal volume is equal ot the vital capacity of the lungs.

which of the following statements is/ are correct regarding normal expiration? (A) it is a passive process (B) it is an active process (C) The volume of thoracic cavity increases (D) The lower ends of the lungs are pulled downwards by the contraction of diaphragm 1) (A),(C) only 2) (A),(B) & (C) only 3) only (A) 4) (A),(C) & (D) only

Which of the following statements (s) regarding the cardiac system is/are correct ? (i) Human heart is an ectodermal derivative (ii) Mitral valve guards the opening between the right atrium and left ventricle (iii) SAN is located on the left upper corner of the right atrium (iv) Stroke volume xx Heart rate = Cardiac output.

Which of the following statements (s) regarding the cardiac system is/are correct ? (i) Human heart is an ectodermal derivative (ii) Mitral valve guards the opening between the right atrium and left ventricle (iii) SAN is located on the left upper corner of the right atrium (iv) Stroke volume xx Heart rate = Cardiac output.

Which of the following is true? (i) If p is a statement then ~p is not a statement (ii) If p is a statement then ~p is also a statement (iii) Negation of p : 0 is a positive number is, 0 is a negative number

Read the following statement (A - D). (A) The movement of air into and out of the lungs is carried out by creating a pressure gradient between the lungs and atmosphere. (B) Inspiration can occur if the pressure within the lungs is more than the atmospheric pressure. (C) Expiration takes place when the intrapulmonary pressure is lesser than the atmospheric pressure. (D) The diaphragm and a specialized set of intercostal muscles in between the ribs help in the generation of such pressure gradients for breathing. How many of the following statements are correct?