Thrombocytopenia is characterized by an insufficient number of due to low production in the bone marrow or breakdown outside the bone marrow. Blood flow to the can stop completely and heart attack or stroke can result from untreated . An inherited clotting disorder with many forms, generally called , causes a deficiency in clotting factor. In all forms of this disorder, even the slightest bump causes in the joints.

The kidney filters potentially toxic substances in the blood, and thus “clears” the blood of those substances. this clearance function is dependent upon and proportional to the diffusion gradient of the substance across filtering capillaries, i.e. if the concentration of the substance is doubled, twice as much will be cleared from each ml of blood that is filtered. suppose that the body produces a constant amount of a substance x per unit of time. the kidneys eliminate substance x at a rate directly proportional to the concentration of the substance and the volume of blood cleared each minute (c): elimination = c × [x], where [x] is the steady-state concentration of substance x. imagine an individual with an initial concentration of x equal to [x]0 who develops kidney disease. her baseline clearance c0 drops to one half of the original (½c0). what is the new steady state concentration of x? (for simplicity, assume that substance x is 100% filtered by the kidney).

Mulitple choice which of the following is a function of the nucleus? a. stores dna b. stores sugars c. builds proteins d. packages proteins

Urban areas use energy than rural areas, mostly because so many more people live there. a) solar power b) more; in total c) less; in total d) an electric furnace