Which layer of the hair is located directly beneath the cuticle layer and is responsible for the incredible strength and elasticity of human hair? hydrogen; hydrogen The term pH is an abbreviation used for potential _____, and the symbol pH represents the quantity of _____ ions in solution.
Arterial and venous pressures are dependent on the patient's access and the QBS. Ideally, the arterial pressure should be no more than - 250, and the venous no greater than 300. But, as mentioned above, it depends much on the patient's access.
1 Veins have valves which maintain the unidirectional flow of blood, even against gravity. 2  Since the venous pressure is low (7 mm Hg) the valves are of utmost value in the venous return. However, the valves are absent in: 3  The veins of less than 2 mm diameter.  The venae cavae.