Posts by George2
Total # Posts: 6
Venous return from the limbs, particularly the lower limb, to the heart is a complex process. Explain with diagrams as appropriate the mechanism(s) that facilitate venous return from the lower limb.
July 12, 2010
a) What is meant by the terms dermal (intramembranous) and endochondral with respect to bone? Give an example of each. b) With the aid of simple diagrams, describe the parts of a young (growing) bone, as typified by the femur. i am comfused with that
June 4, 2010
Which of the following mixtures will be a buffer when dissolved in a liter of water? a. 0.1 mol Ca(OH)2 and 0.3 mol HI b. 0.3 mol NaCl and 0.3 mol HCl c. 0.4 mol NH3 and 0.4 mol HCl d. 0.2 mol HBr and 0.1 mol NaOH e. 0.2 mol H3PO4 and 0.1 mol NaOH i think e is answer but not ...
May 21, 2010
4) Which of the following is the most effective buffer system for a pH value of 4.45? a. H2CO3/HCO3- (K1 = 4.4 * 10-7) b. HCO3-/CO32- (K2 = 4.7 * 10-11) c. H2S/HS- (K1 = 1.0 * 10-7) d. HC2O4-/C2O42- (K2 = 5.0 * 10-5) e. H3PO4/H2PO4- (K1 = 7.5 * 10-3) I think is D. Because when...
May 18, 2010
Which of the following when added to water will cause a significant change in the pH of the solution? 1 NH4HSO4 2 (NH4)2SO4 3 Na2SO4 I believe the answer is 1 & 2. is that right.
May 15, 2010