Greater visual acuity results from convergence of ________ numbers of photoreceptors onto retinal ganglion cells.
Fill in the blank(s) with the appropriate word(s).
lesser (fewer)
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At a capillary bed, a vasoconstrictor
A. constricts local arterioles, thereby increasing pressure and increasing local blood flow. B. stimulates precapillary sphincters and decreases local blood flow. C. dilates local arterioles, thereby increasing pressure and increasing local blood flow. D. inhibits precapillary sphincters to relax and decreases local blood flow. E. constricts precapillary sphincters and thereby increases local blood flow.
Extracorporeal shock-wave lithotripsy is used to treat
A) gout. B) kidney failure. C) kidney stones. D) a urinary tract infection.
Small desert mammals are often osmotically stressed in addition to being heat stressed; therefore they will want to
a. avoid heat loss by evaporative cooling and instead employ heat storage mechanisms to deal with heat stress. b. avoid heat loss by evaporative cooling and instead burrow to seek cooler microclimates. c. avoid heat loss by evaporative cooling and instead restrict their activity to night when ambient temperatures are cooler. d. avoid heat loss by entering into extended periods of sleep and inactivity during the summer (estivation) which is similar to hibernation by some animals in the winter. e. avoid heat loss by evaporative cooling by burrowing and restricting activity to times with cooler temperatures.
Explain the direction in which water moves between compartments as it relates to gradients involving hydrostatic pressure and osmotic pressure
What will be an ideal response?