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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.
A 25 mm diameter steel cylinder falls under its own weight at a uniform rate of 0.1 m/s inside a tube of slightly larger diameter. Castor oil of viscosity 0.25 N.s/m2 fills the spacing between the tube and the cylinder.
what does the free body analysis look like and how to calculate the loads into the horizontal and vertical members of a free standing jib hoist with a 15' boom and 5000 pound capacity
The gate is rectangular with a horizontal width of 2m perpendicular to the paper. For a depth h = 3m of water, calculate the required force exerted by the hydraulic cylinder to keep the gate just closed.
Items are inspected for flaws by two quality inspectors. If a flaw is present, it will be detected by the first inspector with probability 0.9, and by the second inspector with probability 0.7. Assume the inspectors function independently.
The two shafts in a speed-reducer unit are subjected to couples of magnitude M1 = 18 N · m and M2 = 7.5 N · m, respectively. Replace the two couples with a single equivalent couple, specifying its magnitude and the direction of its axis.
What do you understand by the term durability? Compared to other considerations, how much importance should be given to durability in the design and construction of concrete structures?
Calculate the minimum set-back distance required for a national highway of 4 lane divided carriageway having circular curve of radius of 350 m & design speed 100 km/hr.
What is the maximum weight that can be suspended on a 16 Kg poll, 3/5 from the end. The maximum tension of the 30 degree guy-wire is 1500 N. Find the horizontal and vertical forces exerted on the poll by the hinge.
the fixture ac is designed with a screw adjustment to regulate the height of the 900 n load supported by the roller
A 600 mm long solid steel shaft is to transmit a torque of 30 N-m, G=90 GPa, diameter 15mm. Determine (a) Maximum shear stress, and (b) Angle of twist (phi) at the end.
The solid compound shaft, made of three di¤erent materials, carries the two torques shown. (a) Calculate the maximum shear stress in each material. (b) Find the angle of rotation of the free end of the shaft.
a spherical balloon is being inflated so that its volume is increasing at the rate of 5 cu meter/min. at what rate is the diameter increasing when the diameter is 12m?
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