Which of the following processes requires a carrier protein?
A) diffusion only
B) facilitated diffusion only
C) active transport only
D) endocytosis only
E) both facilitated diffusion and active transport
E
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The resting potential of a particular nerve cell is -66 mV. Depolarization of the membrane will shift the membrane potential toward
A) -90 mV. B) -66 mV. C) 0 mV. D) There will be no change. E) There is not enough information to tell.
In females, the egg passes from the ovary to the uterus via the __________, and fertilization
occurs in the __________.
a. oviduct; oviduct b. oviduct; uterus c. urethra; oviduct d. urethra; vagina
In 2006, the greatest use of energy in the United States was _____
1.nuclear energy going to industry 2.natural gas for residential and commercial uses 3.petroleum used for transportation 4.petroleum used in industry
All of the following are problems that growth causes for cells EXCEPT
A) more demands on DNA. B) excess oxygen. C) obtaining enough food. D) expelling wastes.