When one or more presynaptic neurons fire in rapid order it produces a much greater depolarization of the postsynaptic membrane than would result from a single EPSP; this event is called ________ summation
Fill in the blanks with correct word
temporal
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There are about 10 times as many species of anurans as there are species of salamanders. Can you think of a reason why anurans might be a more successful form of amphibian than salamanders are?
What will be an ideal response?
The white matter in each half of the spinal cord is organized into three columns. Which of the following is NOT one of the columns?
A) ventral column B) lateral column C) inferior column D) dorsal column
A molecular biologist discovers that if a specific drug effectively treats obesity in mice, what can researchers conclude?
A. If the drug was effective in a large number of mice, it will therefore be effective in humans. B. If the drug was effective in a small proportion of mice, it will be effective in a small proportion of humans. C. The mice have provided a positive control in this experiment that proves the drug is effective in humans. D. The drug is effective in the mouse model; it must still be tested in humans. E. The effect of the drug on mice has no bearing on the effect of the drug on humans.
The level of testosterone in the blood is increased by
A. the hypothalamus stimulating the testes to release LH. B. LH causing the interstitial cells to release testosterone. C. a high level of testosterone stimulating the testes to release more LH. D. a high level of testosterone stimulating the hypothalamus.