Which of the following is responsible for maintaining the membrane potential?
a. the Na+/K+ pump
b. the diffusion gradient
c. the Ca2+ pump
d. the H+ pump
Ans: a. the Na+/K+ pump
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The reproductive system is the only system that contributes to homeostasis
1.True 2.False
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a. darkened square b. darkened circle c. clear square d. clear circle e. clear diamond
Compounds that cause cancer are called ________
A) mutagens B) carcinogens C) chemicals D) acids E) bases