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Glucose is a molecule that is able to diffuse across the plasmamembrane with a diffusion coefficient (D) of 3 x 10-8 cm/sec.
a) If the concentration of glucose in plasma is 5 mM, and theintracellular glucose concentration is negligible (i.e. 0 mM), whatis the rate of glucose diffusion (J) into the cell? Assume that thethickness of the plasma membrane is 10 nm.
Glucose transport can be enhanced (facilitated) by a transportersuch as GLUT3, which has a Km of 1.5mM and transports glucose at amaximum rate (Vmax) of 104 molecules/sec. Using the equation: rate= Vmax ([S]/[S] + Km), how many molecules per second is each GLUT3able to transport when [S] is 5 mM? How much faster is this ratethan simple diffusion?
Fresh water fish do not survive in water with a high concentration of bicarbonate(HCO3-). Briefly explainwhy this is so.
For the same loan described under Q3, the individual decides that instead of selling the house after the 71stpayment, to keep it and shorten the pay off period by increasing the montly payment by $150 each month.
A sample of 10 television tubes produced by a company showed a mean lifetime of 1200 hours and a standard deviation of 100 hours. Estimate (a) the mean, (b) the standard deviation of the population of all television tubes produced by this company.
What is the alkali-aggregate reaction? List some of the rock types that are vulnerable to attack by alkaline solutions. Discuss the effect of aggregate size on the phenomenon.
The river characteristics just upstream of the wastewater discharge are: flow = 7.5 m3/s, BOD = 5.5 mg/L, DO = 90% of saturation, and temperature = 25oC. For this water, kd = 0.18 d-1 and kr = 0.22 d-1.
A wastewater treatment plant must disinfect its effluent before discharging the wastewater to a near-by stream. The wastewater contains 4.5*105 fecal coliform colony-forming units (CFU) per liter.
Axis Chemical Company needs you to design a gravity sewer to convey 1,750 GPM of toxic waste. The pipe is to be glass-lined reinforced concrete (n = 0.009). Which pipe would you suggest the Joker use
the circular top of a can has a radius of .0320m. the pull-tab has an area of 3.8x10^-4 m^2. the absolute pressure of the carbon dioxide in the can is 1.40x10^5Pa. find the force that these gas generates on the top of a can?
The first stratum is confined, and the second one is unconfined, and the water surface elevations in the channels are 24 m and 16 m above the bottom of the unconfined aquifer.
A fluid flowing in a pipe 30cm in diameter has a uniform velocity of 4m/s. The pressure at the center of the pipe is 40KPa, and the elevation of the pipe's centerline above an assumed datum is 4.5m. Compute the total energy per unit weight of the ..
The solid circular disk of uniform thickness is released from rest on the 60-degree incline. Calculate the angular velocity w of the cylinder and the magnitude v of the velocity of its center C after it has moved 10 ft down the incline.
A horizontal rectangular concrete channel terminates in a free outfall. The channel is 4m wide and carries a discharge of water 12 cms. What is the water depth 300 m upstream from the outfall
A normally consolidated clay layer is 4 m thick (one way drainage). From the application of a given pressure, the total anticipated primary consolidation settlement will be 80mm. What is the average degree of consolidation for the clay layer.
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