Chapter 7: Q20CP (page 217)
Why do the symptoms of an autoimmune disease often differ between individuals?
Short Answer
The symptoms of an autoimmune disease often differ between individuals due to their difference in locations and severity.
Chapter 7: Q20CP (page 217)
Why do the symptoms of an autoimmune disease often differ between individuals?
The symptoms of an autoimmune disease often differ between individuals due to their difference in locations and severity.
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Get started for freeThe crocodile, which can remain under water without breathing for up to 1 h, drowns its air-breathing prey and then dines at its leisure. An adaptation that aids the crocodile in doing so is that it can utilize virtually 100% of the O2 in its blood, whereas humans, for example, can extract only∼65% of the O2in their blood. Crocodile Hb does not bind BPG. However, crocodile deoxyHb preferentially binds HCO3−. How does this help the crocodile obtain its dinner?
Is myosin a fibrous protein or a globular protein? Explain.
In humans, the urge to breathe results from high concentrations of CO2 in the blood; there are no direct physiological sensors of blood pO2. Skin divers often hyperventilate (breath rapidly and deeply for several minutes) just before making a dive in the belief that this will increase the O2 content of their blood. (a) Does it do so? (b) Use your knowledge of hemoglobin function to evaluate whether this practice is useful.
Use Eq. 7-8 to estimate the fractional saturation of hemoglobin when pO2 is (a) 20 torr, (b) 40 torr, and (c) 60 torr.
Calculate the p50 value for hemoglobin if Yo2 = 0.82 when pO2 = 25 torr.
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