1) Os íons sódio (Na+) e potássio (K+), são essenciais para o funcionamento da célula, atuando no funcionamento muscular e também na sinapse química que ocorre entre neurônios. Um estudo desenvolvido por pesquisadores de uma universidade revelou as seguintes medidas destes íons no interior de neurônios gigantes de lula: [ Na+ ] no citoplasma = 50
[ Na+ ] no meio extracelular = 440
[K+] no citoplasma = 400
[K+] no meio extracelular = 20​

Why aren't the stains like crystal violet and safranin washed away with water during simple staining?

Astudent observes a star from two positions of earth in its orbit, in summer and winter, and measures the change in the position of the star. which of these can be best calculated by this method?

Humans are believed to have evolved in coastal regions in east africa. the region had an abundant supply of fish for early humanoids to eat. when scientists analyze the fads gene they see an interesting pattern. people whose families have lived in this area of east africa for generation show a high level of diversity in alleles for the fads gene. conversely, people whose families had migrated inland a moderate distance from sources of fish showed a much lower diversity for fads gene alleles. additionally, the fads alleles found in people whose family has lived inland for generation are almost all gene alleles which produce fads proteins with a high level of function and activity. how do anthropologists explain this?