One model of the glomerular membrane is a microporous membrane in which right cylindrical pores penetrate all the way through the membrane. assume that the pores have a length of 50 nm and a radius of 3.5 nm.
the viscosity of plasma is 0.002 pa*s. the average hydrostatic pressure in the glomerulus is 60 mm hg, hydrostatic pressure in bowman’s space is 20 mm hg and the average oncotic pressure of glomerular capillary blood is 28 mm hg. a. calculate the flow through a single pore assuming laminar flow (use the poiseuille flow equation).b. how many pores would there have to be to produce a normal gfr (120 ml/min)? c. if the total aggregate area of the kidneys for filtration is 1.5 m2, what is the density of the pores (number of pores per unit area)? d. what fraction of the area is present as pores?

i think the answer would be d

hypoxemia refers to a below usual concentration of oxygen in the blood, mainly in the arteries. hypoxemia is an indication of an issue associated with circulation or breathing and may lead to various symptoms like shortness of breath.  

the condition is identified by determining the level of oxygen in the blood sample obtained from an artery. it can also be predicted by determining the oxygen saturation of the blood with the application of a pulse oximeter.  

the normal arterial oxygen is about 75 to 100 mm hg. the values underneath 60 mm hg is generally considered with the requirement for supplemental oxygen. the normal pulse oximeter readings generally range between 95 to 100 percent. the values under 90 percent are regarded as low.  

in the given case, the oxygen saturation is measured at 93 percent, hence, there is no need to administer oxygen, that is, one should withhold oxygen.