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© © 110 | Amo 15% For Question #s 29-34, refer to the Hb-oxygen dissociation curve at right. 112 Percent hemoglobin saturation mL o, per 100 ml blood 10 20 30 40 50 60 70 80 Po, of blood (mm Hg) 90 100... up to 760 29. The characteristic sigmoid shape of the Hb-oxygen dissociation curve is due to what property of hemoglobin? (2 pts) 30. Identify the Hb Pso for this curve. (2 pts)

Answer 1

29.It is also called oxyhaemoglobin dissociation curve or 0xygen dissociation curve. The curve is usually described by a formula

S(t) =1/1+e-t

30. a It describes the relation between the partial. Pressure of oxygen in x axis and oxygen saturation in y axis. P50 is the oxygen tension at which 50% of haemoglobin is saturated. The normsl range where the curve is fairly horizontal.

b. The rightward shift increased p 60 and lowes haemoglobin afginity for oxygen

The leftward shift decreases p 50 and increases haemoglobin afginity for o2.

31a.It is104mmHg.

b. With exercise more capillary bed are recruited to lungs thereby decreading blood flow to lungs.

32.a 1.5% ofoxygen in the blood is disdolved by itself.

98.5 blood is bound to haemoglobin.

b. Approximately 200ml is extracted out of the arterial blood. 20ml in venous blood.

c. The important principle is to remember is thatoxygen enters blood from the lungs and carbon dioxide is expelled out of the blood in to the lungs.

33.b.It increases as a successive molecules to oxygen bind as the partial presdure increases until the maximum amount bound is reached.

c The foetal dissocistion curve is shifted to the left relative to the curve for the normal adult becausevof structural differences.