A woman's pregnancy has been uneventful, and she has gained 25 lb (11.3 kg). At term her hemoglobin level is 10.6 g/dL (106 mmol/L) and her hematocrit is 31%. What is the physiological reason for these hemoglobin and hematocrit levels

An adult inhales about 6.0×10−4 m3 of fresh air during a breath. only 20% of fresh air is oxygen. assume the pressure in the lungs is 1.0×105 paand the air is at a temperature of 300 k. how many oxygen molecules are in each breath? a. 1.4x10^23 b. 2.9x10^21 c. 4.9x10^-4 d. 2.9 x10^25