Ib Chapter 20 Questions

Chapter 20 questions 1.The micrograph below (figure 12) shows human logical argument. (a)Identify the cells labeled I and II. I= Erythrocyte II= Lymphocyte ii) The lymph cell has a defined and locomote nucleus while the erythrocyte does non ware any. (b)Distinguish the cells labeled II and threesome. Cell III corresponds to a phagocyte, because it has a lobed nucleus while the lymphocyte has a rounded and whole nucleus as give tongue to before. (c)(I) The original diameter of the erythrocytes is 7 µm. Calculate the magnification of the micrograph. diameter= 11mm 11*1000/(7) = 11000/7 = x 1571 (ii) Using this magnification, calculate the effective diameters of the largest and smallest leucocytes in the micrograph. 2) To pump blood, the heart goes through a accompanying publication of action, called the cardiac cycle. These actions are listed below in alphabetical order. adjust them in the correct sequence, explodeing with the contra ction of the atria. Some actions issue forth simultaneously. Order is. Atria showtime 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 take away from the blood. The lungs (II) type O diffuses into the blood. The lungs (III)Oxygen diffuses forth of the blood The respiring tissues (IV) G lucose and other nutrients code the blood. ! The small intestine. (V)Hormones 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 thermal energy. The lungs, skin, and rectum. (II) show one part of the body where blood usually gains thermal energy. The muscles. (c)Suggest one component of blood plasma that increases in...If you want to attempt a full essay, order it on our website: BestEssayCheap.com

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