2 Owgen a mestly transported through the body of muscles om and chest 74 wha tys
ID: 271702 • Letter: 2
Question
2 Owgen a mestly transported through the body of muscles om and chest 74 wha tyse of biood vessel is sotely responsible for eschengs between the blood and the 0) artery venule s Which of the following choices lsts the correct path of carbon dloxide moving from the Interior A alveoli, bronchi, bronchloles, trachea, larynx, B) alveoll, branchioles. Bronchl, trachea, laryes, pharynx. CI alveoll, bronchioles, bronchl, trachea, pharynx, larynx D) abveoi, bronchi bronchioles, trachea, pharynx, larynx ) alveoll, traches, bronchioles, bronchl pharynx, larnx 76. What is the most common cause of anemia? A) vitamin deficiency 8) insufficient hemoglobin production. C) bone marrow cancer. DI low blood pressure E) iron deficiency. 7. What hormone stimulates the production of red blood cells? A) thymosin. B) thyroxine. C) erythropoietin. D) insulin. Cancer of white blood cells is called A) a thrombus 8) a stroke. C] erythropoies's. D) hemophilia. E) leukemia. 78.Explanation / Answer
72. The main carrier of oxygen from lungs to all body parts are red blood cells(RBCs). RBCs consist of an important iron containing pigment called Haemoglobin. One molecule of haemoglobin consists of four subunits and each subunit has a central iron (haeme) molecule which binds to one oxygen molecule. Thus one molecule of haemoglobin can bind to four molecules of oxygen.
Hence option (D) is correct.
73. Inhalation in human beings means taking in or breathing in of oxygen with the help of lungs. The contraction of diaphragm and chest muscles leads to negative pressure in lungs, which causes the flow of air inside the lungs.
Relaxation of diaphragm leads to exhalation and not inhalation.
Hence option (A) is correct.
74. Arteries carry oxygenated blood from heart to all the tissues of the body whereas veins carry deoxygenated blood from body parts to heart. Arterioles carry blood from arteries to capilaries whereas venules carry blood from capilaries to veins.
Capilaries are the thin walled cells where transfer of oxygen and other nutrients takes place between blood and the interstitial fluid.
Hence option (A) is correct.
75. The carbon dioxide formed during respiration in the cells is transported to outside by the smallest branches of the lungs called Alveoli. from Alveoli blood reaches to Bronchioles, Bronchi and then to trachea. From Trachea CO2 is transfered to Larynx and then to Pharynx.
Hence option (B) is correct.
76. The most common cause of Anemia (decreased level of haemoglobin) is defficiency of iron in the food. Iron is important for the making of Haemoglobin in the body. In females the loss of iron may also be due to heavy menstruation and thus leads to Anemia.
Hence option (E) is correct.
77. Thymosin stimulates the production of T lymphocytes.Thyroxine is secreated by thyroid gland which controls the basic metabolism of the body. Insulin is secreated by pancrease and helps in maintaining blood sugar level in the body. Testosterone is secreated by testies in males and helps in the development of secondary sexual characters in males.
Erythropoiesis is the process of production of RBCs in the bone marrow by the pluripotent stem cells. It is stimulated by the Erythropoietin hormone secreted by kidneys.
Hence option (C) is corrected.
78. During the process of blood cogulation the final blood clot formed is called Thrombus. Stroke is condition which leads to the death of brain cells due to poor flow of blood. The process of production of RBCs is called Erythropoiesis. Haemophilia is a genetic disorder due to which blood clotting is impaired.
Leukemia is type of blood cancer caused by abnormal WBCs. It impairs the production of RBCs and platelets.
Hence option (E) is correct.
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