When the potential across a membrane reaches threshold, the sodium channels ____
a. open to let sodium enter the cell rapidly
b. close to prevent sodium from entering the cell
c. open to let sodium exit the cell rapidly
d. close to prevent sodium from exiting the cell
a
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Which of the following is an example of public health measures that helped reduce death rates in the United States?
a. better communication and transportation systems b. changing attitudes toward death c. advanced medical technology d. improvements in basic sanitation and disposal of sewage e. better food, clothing, and housing
Which of the following would be considered an estimator variable in the dichotomy of eyewitness identification variables provided by Gary Wells?
A. line-up instructions B. photo spread composition C. lighting conditions at the time of the crime D. none of the above
The heritability of intelligence _____________ from childhood to adulthood
a. decreases b. increases c. stays the same d. has not been calculated in this area of research
While watching a pizza being cut into 10 pieces, eight-year-old Rogerio suddenly realizes that the 10 pieces of pizza are actually the same amount as the original one pizza. This realization best reflects the process of
A. reversibility. B. A not B error. C. seriation. D. static thought.