Consider A, B and C for oesophagus and choose option which have all correct statements for it ? A. It is a thin and long tube B. It extends anteriorly passing through neck thorax and diaphragm C. It's upper end have huge amount of longitudinal muscles so it remains closed normally only opens at the time of swallowing

Someone me with this: a mineral' is determined by its actomic structure.

The transport tubes for food coming down the plants are called?

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).