(a) for a nonsmoker, with blood viscosity of 2.50 10-3 pa·s, normal blood flow requires a pressure difference of 8 mm hg between the two ends of a certain artery. if this person were to smoke regularly, his blood viscosity could increase to 2.83 10-3 pa·s (a 13% increase), and the diameter of his artery would constrict by 11%. what pressure difference between the ends of the artery would then be needed to maintain the same blood flow rate?

affects the water bodies: excessive use of fertilizers causes eutrophication. the fertilizers which are used on plants affect the quality of land on which it is used, further causing erosion of soil. the fertilizers used on plants contain harmful chemical fumes which affect the environment.

answer: national resource conservation services

national resource conservation services is the us. based approach that provides technical and financial assistance for natural resource management. nrcs society in conservation of resources by involving in activities like farmland protection, flood prevention, watershed protection, urban conservation, conserves economic and environmental conditions. it conducts soil surveys and implements the policy of natural resources management on the society.