Which of the following describes the role of urinary systems in maintaining cellular homeostasis?
A) Urinary systems filter out diseased and damaged cells that can be excreted from the body.
B) Urinary systems regulate water balance, pH, and the concentrations of ions in body fluids for cells.
C) Urinary systems ensure the delivery of the proper amount of nitrogen to the cells.
D) Urinary systems are important for the generation of urea, which cells can use as an energy source when carbohydrates become scarce.
B
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Activation energy is not required for nonspontaneous reactions
Indicate whether the statement is true or false.
All eubacteria are:
a. multicellular, prokaryotes b. unicellular, prokaryotes c. multicellular, eukaroyotes d. unicellular, eukaryotes
In Waller's experiment, he placed each of his feet into a pan containing ____
a. carbon dioxide b. iron c. mercury d. pure water e. salt solution
Which of the following would most likely form electrolytes in water?
a. glucose b. ethanol c. an organic compound d. an inorganic compound e. a nonionic compound