Ib Chemistry

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 delimit 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 complete 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* chiliad/(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 shore them in the correct sequence, actuateing with the contraction of the atria. Some act ions go on simultaneously. Order is. Atria grow to contract. Blood is pumped from the atria to ventricles. Ventricles start to contract. atrioventricular 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 keep up forth of the blood The respiring tissues (IV) Glucose and other nutrients write d own the blood. The small intestine. (V)H! ormones enter the blood Endocrine glands (VI)urea is removed from the blood The kidneys b) (I) suggest two parts of the body where blood usually looses thermic energy. The lungs, skin, and rectum. (II) purpose 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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