73. Floor of the chest cavity is formed by(A) Lungs (B) Ribs(C) Diaphragm (D) Pericardium74. The action of bile can be called(A) Oxidation (B) Emulsification(C) Esterification (D) Dehydrogenation75. Mammals are said to have a double circulatory system. It means that(A) Blood vessels are paired, e.g., artery to each leg(B) There are two types of blood vessels attached to every organ e.g., an artery and a vein(C) There are two systems, one from the heart to the lungs and then lungs to heart(D) The blood circulates twice in the heart during each trip around the body76. Which of the following statements regarding anaerobic respiration is not correct?(A) yeast show anaerobic respiration(B) alcohol and lactic acid is a product of it(C) anaerobic respiration does not play any role in muscle cramp(D) fermentation is another anaerobic pathway for breaking down glucose77. The site for light reaction in plants is(A) Grana (B) Stroma(C) ER (D) Cytoplasm78. During anaerobic respiration done by yeast, how many ATP are formed from one molecule ofglucose?(A) 38 (B) 42(C) 2 (D) None79. Which of the following is a respiratory disease?(A) Emphysema (B) Asthma(C) Bronchitis (D) All of aboveSpace for Rough Work

The given diagram shows double circulation of blood in a mammal.The blood vessel H representsA. vena cava.B. dorsal aorta.C. femoral artery.D. pulmonary vein.HBlood capillaries in lungsBlood capillaries in body tissues

Which arteries branch off from the thoracic aorta and supply the lung tissues with blood?

In the double circulation of vertebrates which of the following carry the blood to the lungs?Multiple choice question.Pulmonary ventriclesPulmonary arteriesAortaPulmonary vein

Both acidic and alkaline mediumNeutral medium       When we breathe in ourRibs are lifted and diaphragm is flattenedRibs are lifted and diaphragm is curvedRibs are pushed down and diaphragm is flattenedRibs are pushed down and diaphragm is curved       Lungs receive deoxygenated blood from which chamber of the heartRight atriumLeft atriumRight ventricleLeft ventricle       Which among the following has two chambered heartAmphibiansFishesReptilesBoth A and C       The blood corpuscle which plug the leaks by helping to clot the blood at the points of injury isErythroblastsLeucocytesLymphocytesPlatelets       Plants intake nitrogen and phosphorus abundantly fromSoilWaterAirSunlight       Which of the following tissue is responsible for water transportation in plantsXylem tissuePhloem TissueMeristematic tissueCollenchyma tissue       What creates the suction to pull the water from xylem cells of rootsPhotosynthesis in leavesEvaporation in leavesGas exchange in leavesAll the above       Phloem in the plants are responsible forTransportation of oxygenTransportation of waterTransportation of amino acidsTransportation of minerals

rted into bicarbonate ionsIt is stored in the lung tissue       Which chamber of the heart receives oxygen-rich blood from the lungs?Right atriumLeft atriumRight ventricleLeft ventricle       Identify A,B,C and D in the following schematic plan of blood circulation in humans diagram.A) pulmonary vein, B) aorta, C) vena cava, D) pulmonary arteryA) pulmonary artery, B) aorta, C) pulmonary vein, D) vena cavaA) vena cava, B) pulmonary vein, C) aorta, D) pulmonary veinA) aorta, B) pulmonary vein, C) pulmonary artery, D) vena cava       Which chamber of the heart receives deoxygenated blood from the body?Left atriumRight atriumLeft ventricleRight ventricle       What is the term used to describe the circulatory system in vertebrates where blood passes through the heart twice during each cycle?Pulmonary CirculationDouble circulationSystemic CirculationBoth B and C       Which of the following statements about veins is true?Veins have thick walls to withstand high pressure.Veins have thin walls because the blood is no longer under high pressure.Veins lack valves because blood flows under high pressure.Veins only carry oxygenated blood.       What is the primary function of the blood in relation to carbon dioxide?To transport oxygen to body tissuesTo bring carbon dioxide from the rest of the body for release into the alveoliTo deliver nutrients to the cells of the bodyTo carry hormones to target organs of the body       Which of the following statements about the diaphragm is correct?It forms the roof of the chest cavityIt separates the chest from the abdomenIt is made of cartilageIt is responsible for secreting digestive enzymes       What happens to pyruvate when there is insufficient oxygen in muscle cells?It is converted into glucoseIt is converted into lactic acidIt is stored as glycogenIt is released as carbon dioxide