Chapter 20 questions 1.The micrograph below (figure 12) shows human ancestry. (a)Identify the cells labelled I and II. I= Erythrocyte II= Lymphocyte ii) The lymphocyte has a specify and rounded nucleus while the erythrocyte does non have any. (b)Distinguish the cells labeled II and triplet. Cell III corresponds to a phagocyte, because it has a lobed nucleus while the lymphocyte has a rounded and unit of measurement nucleus as give tongue to before. (c)(I) The literal diam of the erythrocytes is 7 µm. Calculate the magnification of the micrograph. diam= 11mm 11* mebibyte/(7) = 11000/7 = x 1571 (ii) Using this magnification, calculate the actual diameters of the largest and smallest leucocytes in the micrograph. 2) To pump blood, the heart goes through a serial of action, called the cardiac cycle. These actions are listed below in alphabetical order. go pig them in the correct sequence, actuateing with the contraction of the atria . Some actions go along simultaneously. Order is. Atria first to contract. Blood is pumped from the atria to ventricles. Ventricles start to contract. auriculoventricular valves close. Seminular valves open. Blood is pumped from ventricles to arteries. Atria start to fill with blood. Seminular valves close. Atrioventricular vales open.
Ventricles start to fill with blood. 3) State where (I) Carbon dioxide is upstage from the blood. The lungs (II) Oxygen diffuses into the blood. The lungs (III)Oxygen diffuses compress in forth of the blood The respiring tissues (IV) Glucose and other nutrien ts commemorate the blood. The small intes! tine. (V)Hormones enter the blood Endocrine glands (VI)urea is removed from the blood The kidneys b) (I) suggest deuce parts of the body where blood usually looses caloric energy. The lungs, skin, and rectum. (II) notify one part of the body where blood usually gains thermal energy. The muscles. (c)Suggest one component of blood plasma that increases in...
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