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Thinking Scientifically
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1. If a student gets only 3 hours of sleep for several days, how might her sleeping pattern differ from normal on her next full night of sleep?

2. All human brains are about the same size, contain the same major structures, and function in similar ways. How, then, does each of us develop a distinct personality?

3. How might defects in cell adhesion and signal transduction affect nerve impulse transmission?

4. In myasthenia gravis, progressive muscle weakness results from destruction of a neurotransmitter at the junctions between neurons and muscle cells. Which neurotransmitter is it?

5. What symptom might result from an overdose of a SSRI drug? (Don’t try this!)

6. In 1999, British researchers examined the brain of Albert Einstein, which had been hidden by the pathologist who performed the autopsy for decades. Although the brain was of normal size, the researchers identified a part of the parietal lobe that was about 15 percent wider than normal. This area controls mathematical reasoning, imagery, and the ability to visualize objects in space. A particular groove in the area appeared much reduced, leading the researchers to speculate that this might have allowed more synaptic connections to form than normal. What additional information would help to determine whether Einstein’s brain distinctions could have accounted for his genius?

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