STD 11 - 19. Chemical coordination and integration — NEET STD 11 Science — Question

Progestogens alone or in combination with estrogens can be used as a contraceptive in the form of

Blood leaving liver and moving to heart will have more concentration of

Select the correct statement from the once given below

Closed circulatory system occurs in

Which were dominant during mesozoic era

Which type of mouthparts is present on the lateral side of the pre-oral cavity in cockroach?

Which one of the following statements are correct ?
(A) The diffusion membrane is made up of three major layer squamous epithelium of alveoli, endothelium of alveolar capillaries and basement substance in between them.
(B) Total thickness of diffusion membrane is more than millimeter.
(C) Alveolar wall of alveoli is one celled thin wall.
(D) About 97% of O₂ and 20-25 % of CO₂ is transported by Hb in the blood.
(E) 3% of O₂ and 7 % of CO₂ is carried in a dissolved state through plasma of blood.
(F) O₂ bind with Hb in reversible manner to form oxyhaemaglobin. Each Hb molecule can carry a maximum of two molecules of O₂
(G) A sigmoid curve is obtained by plotting percentage saturation of Hb with O₂ against pO₂ . This curve is called oxygen dissociation curve.
(H) For the formation of oxyhaemoglobin in the alveoli, favourable factors are high pO₂, low CO₂ low pH and lower temperature.
(I) Every 100ml of oxygenated blood can deliver 5 ml of O₂ to the tissue under normal physiological conditions.
(J) CO₂ is carried by haemoglobin as carbamino - haemoglobin.
Choose the correct option given below :-