Normal homeostatic conditions require potassium concentrations to be about 1000 times higher inside the cell than in the blood.

what mechanism does a cell use to move these small potassium molecules into the cell against the concentration gradient

Which of these is most likely to happen if parallax measurements of star distances are taken after a gap of six months? the results would be accurate the results would be inconsistent the results would not be valid the results would not be repeated

What organs comprise the respiratory system of a bird

Why has two different alleles for the same trait?