To maintain homeostasis, the respiratory system depends on the nervous system for signals to
a. exchange gases with the circulatory system.
b. enhance the amount of available oxygen in the lungs.
c. release enzymes to increase the exchange of gases.
d. coordinate the muscles that control breathing.

Which of the following is a consequence of urban heat islands? increased precipitation downwind of the city? increased precipitation upwind of the city? decreased winds within the city? increased winds within the city?

Explain the source of radioactivity in uranium in earth’s crust by which it produces nuclear radiation

Aresearcher created three groups based on participants bmi: normal weight, overweight and obese. the hypothesis being tested is that the three groups differ in the mean number of artificially sweetened drinks consumed weekly. which statistical test might the researcher use, assuming a reasonably normal distribution of values.