In CAPD, what serves as the dialysis membrane?
A. the walls of the blood vessels
B. a filter inside the instrument
C. the pleural membrane
D. the kidneys themselves
E. the peritoneum
Answer: E
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High blood pressure in mammals reflexively causes a decrease in heart rate, which results in lowered blood pressure. This is a __________ because ____________
A. negative feedback loop; response to the signal results in a decrease of that signal B. negative feedback loop; response to the signal results in an increase of that signal C. positive feedback loop; response to the signal results in a decrease of that signal D. postive feedback loop; response to the signal results in an increase of that signal E. None of the above are correct.
Terrestrial biomes are defined in a large part by ________
A) the animals that live there B) the plants that live there C) the altitude D) the longitude
A single breeding male red-winged blackbird (Agelaius phoeniceus) may mate with several females, but each female usually mates with only one male. This type of mating system is known as:
a. polygynandry. b. polyandry. c. monogamy. d. polygyny. e. serial monogamy.
Factors that help to limit growth of woody plants in temperate grasslands include
A) nutrient-poor soil and high insect diversity. B) fires and grazing by large mammals. C) large numbers of cacti and small numbers of grazing mammals. D) mild winters and low annual precipitation.